Rabbit RabbitCore User manual

RabbitCore RCM3750
C-Programmable Core Module
with Ethernet, Serial Flash, and Enhanced Software
User’s Manual
019–0149 • 070831–E

RabbitCore RCM3750
Rabbit Semiconductor Inc.
www.rabbit.com
RabbitCore RCM3750 User’s Manual
Part Number 019-0149 • 070831–E • Printed in U.S.A.
©2005–2007 Rabbit Semiconductor Inc. • All rights reserved.
Rabbit Semiconductor reserves the right to make changes and
improvements to its products without providing notice.
Trademarks
Rabbit and Dynamic C are registered trademarks of Rabbit Semiconductor Inc.
Rabbit 3000 and RabbitCore are trademarks of Rabbit Semiconductor Inc.
No part of the contents of this manual may be reproduced or transmitted in any form or by any means
without the express written permission of Rabbit Semiconductor.
Permission is granted to make one or more copies as long as the copyright page contained therein is
included. These copies of the manuals may not be let or sold for any reason without the express written
permission of Rabbit Semiconductor.
The latest revision of this manual is available on the Rabbit Semiconductor Web site,
www.rabbit.com, for free, unregistered download.

User’s Manual
TABLE OF CONTENTS
Chapter 1. Introduction 1
1.1 RCM3750 Features...............................................................................................................................1
1.2 Advantages of the RCM3750 ...............................................................................................................3
1.3 Development and Evaluation Tools......................................................................................................4
1.3.1 Development Kit...........................................................................................................................4
1.3.2 Software........................................................................................................................................5
1.3.3 Application Kits............................................................................................................................5
1.3.4 802.11b Wi-Fi Add-On Kit...........................................................................................................5
1.3.5 Online Documentation..................................................................................................................6
Chapter 2. Getting Started 7
2.1 Install Dynamic C.................................................................................................................................7
2.2 Hardware Connections..........................................................................................................................8
2.2.1 Attach Module to Prototyping Board............................................................................................8
2.2.2 Connect Programming Cable........................................................................................................9
2.2.3 Connect Power............................................................................................................................10
2.2.3.1 Overseas Development Kits............................................................................................... 10
2.3 Starting Dynamic C ............................................................................................................................11
2.4 Run a Sample Program.......................................................................................................................11
2.4.1 Troubleshooting ..........................................................................................................................11
2.5 Where Do I Go From Here? ...............................................................................................................12
2.5.1 Technical Support.......................................................................................................................12
Chapter 3. Running Sample Programs 13
3.1 Introduction.........................................................................................................................................13
3.2 Sample Programs................................................................................................................................15
3.2.1 Use of Serial Flash......................................................................................................................17
3.2.2 Serial Communication.................................................................................................................17
3.2.3 A/D Converter Inputs..................................................................................................................19
Chapter 4. Hardware Reference 21
4.1 RCM3750 Digital Inputs and Outputs................................................................................................22
4.1.1 Memory I/O Interface .................................................................................................................26
4.1.2 Other Inputs and Outputs............................................................................................................26
4.2 Serial Communication ........................................................................................................................27
4.2.1 Serial Ports..................................................................................................................................27
4.2.2 Ethernet Port ...............................................................................................................................28
4.2.3 Serial Programming Port.............................................................................................................28
4.3 Serial Programming Cable..................................................................................................................30
4.3.1 Changing Between Program Mode and Run Mode....................................................................30
4.3.2 Standalone Operation of the RCM3750......................................................................................31
4.4 Other Hardware...................................................................................................................................32
4.4.1 Clock Doubler.............................................................................................................................32
4.4.2 Spectrum Spreader......................................................................................................................32

RabbitCore RCM3750
4.5 Memory..............................................................................................................................................33
4.5.1 SRAM.........................................................................................................................................33
4.5.2 Flash EPROM.............................................................................................................................33
4.5.3 Serial Flash.................................................................................................................................33
4.5.4 Dynamic C BIOS Source Files...................................................................................................33
Chapter 5. Software Reference 35
5.1 More About Dynamic C.....................................................................................................................35
5.2 Dynamic C Functions.........................................................................................................................37
5.2.1 Board Initialization.....................................................................................................................38
5.2.2 Analog Inputs .............................................................................................................................39
5.2.3 Digital I/O...................................................................................................................................55
5.2.4 Serial Communication Drivers...................................................................................................56
5.2.5 TCP/IP Drivers...........................................................................................................................56
5.3 Upgrading Dynamic C .......................................................................................................................57
5.3.1 Add-On Modules........................................................................................................................57
5.3.1.1 Featured Application Kit................................................................................................... 57
Chapter 6. Using the TCP/IP Features 59
6.1 TCP/IP Connections...........................................................................................................................59
6.2 TCP/IP Primer on IP Addresses.........................................................................................................61
6.2.1 IP Addresses Explained..............................................................................................................63
6.2.2 How IP Addresses are Used.......................................................................................................64
6.2.3 Dynamically Assigned Internet Addresses.................................................................................65
6.3 Placing Your Device on the Network ................................................................................................66
6.4 Running TCP/IP Sample Programs....................................................................................................67
6.4.1 How to Set IP Addresses in the Sample Programs.....................................................................68
6.4.2 How to Set Up your Computer for Direct Connect....................................................................69
6.5 Run the PINGME.C Sample Program................................................................................................70
6.6 Running Additional Sample Programs With Direct Connect ............................................................70
6.6.1 RabbitWeb Sample Programs.....................................................................................................71
6.6.2 Secure Sockets Layer (SSL) Sample Programs..........................................................................72
6.6.3 Dynamic C FAT File System, RabbitWeb, and SSL Modules ..................................................72
6.7 Where Do I Go From Here?...............................................................................................................74
Appendix A. RCM3750 Specifications 75
A.1 Electrical and Mechanical Characteristics ........................................................................................76
A.1.1 Headers......................................................................................................................................79
A.2 Bus Loading ......................................................................................................................................80
A.3 Rabbit 3000 DC Characteristics........................................................................................................83
A.4 I/O Buffer Sourcing and Sinking Limit.............................................................................................84
A.5 Conformal Coating............................................................................................................................85
A.6 Jumper Configurations ......................................................................................................................86
Appendix B. Prototyping Board 87
B.1 RCM3700 Prototyping Board............................................................................................................88
B.1.1 Features......................................................................................................................................89
B.1.2 Mechanical Dimensions and Layout..........................................................................................91
B.1.3 Power Supply.............................................................................................................................92
B.1.4 Using the RCM3700 Prototyping Board ...................................................................................93
B.1.4.1 Adding Other Components ............................................................................................... 94
B.1.5 Analog Features.........................................................................................................................95
B.1.5.1 A/D Converter Inputs........................................................................................................ 95
B.1.5.2 Thermistor Input ............................................................................................................... 97
B.1.5.3 Other A/D Converter Features.......................................................................................... 98
B.1.5.4 A/D Converter Calibration................................................................................................ 99

User’s Manual
B.1.6 Serial Communication..............................................................................................................100
B.1.6.1 RS-232............................................................................................................................. 101
B.1.6.2 RS-485............................................................................................................................. 102
B.1.7 Other Prototyping Board Modules ...........................................................................................104
B.1.8 Jumper Configurations .............................................................................................................105
B.1.9 Use of Rabbit 3000 Parallel Ports ............................................................................................107
B.2 RCM3720 Prototyping Board..........................................................................................................109
B.2.1 Features ....................................................................................................................................110
B.2.2 Mechanical Dimensions and Layout........................................................................................111
B.2.3 Power Supply ...........................................................................................................................112
B.2.4 Using the RCM3720 Prototyping Board..................................................................................113
B.2.4.1 Prototyping Area.............................................................................................................. 115
B.2.5 Serial Communication..............................................................................................................116
B.2.6 Use of Rabbit 3000 Parallel Ports ............................................................................................118
Appendix C. LCD/Keypad Module 121
C.1 Specifications...................................................................................................................................121
C.2 Contrast Adjustments for All Boards...............................................................................................123
C.3 Keypad Labeling..............................................................................................................................124
C.4 Header Pinouts .................................................................................................................................125
C.4.1 I/O Address Assignments.........................................................................................................125
C.5 Install Connectors on Prototyping Board.........................................................................................126
C.6 Mounting LCD/Keypad Module on the Prototyping Board ............................................................127
C.7 Bezel-Mount Installation..................................................................................................................128
C.7.1 Connect the LCD/Keypad Module to Your Prototyping Board...............................................130
C.8 Sample Programs .............................................................................................................................131
C.9 LCD/Keypad Module Function Calls ..............................................................................................132
C.9.1 LCD/Keypad Module Initialization..........................................................................................132
C.9.2 LEDs.........................................................................................................................................132
C.9.3 LCD Display.............................................................................................................................133
C.9.4 Keypad......................................................................................................................................153
Appendix D. Power Supply 157
D.1 Power Supplies.................................................................................................................................157
D.1.1 RCM3750.................................................................................................................................157
D.1.2 Battery-Backup Circuits...........................................................................................................158
D.1.3 Reset Generator........................................................................................................................158
Appendix E. Secure Embedded Web Application Kit 159
E.1 Sample Programs..............................................................................................................................160
E.2 Module Documentation....................................................................................................................160
Index 161
Schematics 165

RabbitCore RCM3750

User’s Manual 1
1. INTRODUCTION
The RCM3750 is a compact module that incorporates the latest
revision of the powerful Rabbit®3000 microprocessor, flash
memory, onboard serial flash, static RAM, and digital I/O ports.
The RCM3750 features an integrated 10/100Base-T Ethernet
port that provides for LAN and Internet-enabled systems.
Throughout this manual, the term RCM3700 refers to the complete line of RCM3700 Rab-
bitCore modules, and includes the RCM3750 unless other production models are referred
to specifically.
The RCM3750 has a Rabbit 3000 microprocessor operating at 22.1 MHz, static RAM,
flash memory, two clocks (main oscillator and real-time clock), and the circuitry necessary
for reset and management of battery backup of the Rabbit 3000’s internal real-time clock
and the static RAM. One 40-pin header brings out the Rabbit 3000 I/O bus lines, parallel
ports, and serial ports.
The RCM3750 receives regulated DC power from the customer-supplied motherboard on
which it is mounted. The RCM3750 can interface with all kinds of CMOS-compatible
digital devices through the motherboard.
The Development Kit and the Ethernet Connection Kit have what you need to design your
own microprocessor-based system: a complete Dynamic C®software development system
with optional modules and a Prototyping Board that allows you to evaluate the RCM3750
and to prototype circuits that interface to the RCM3750 module.
1.1 RCM3750 Features
•Small size: 1.20" x 2.95" x 0.89"
(30 mm x 75 mm x 23 mm)
•Microprocessor: latest revision of Rabbit 3000 running at 22.1 MHz supports Dynamic C
Secure Sockets Layer (SSL) module for added security
•33 parallel 5 V tolerant I/O lines: 31 configurable for I/O, 2 fixed outputs
•External reset I/O
•Alternate I/O bus can be configured for 8 data lines and 5 address lines (shared with
parallel I/O lines), I/O read/write
•Ten 8-bit timers (six cascadable) and one 10-bit timer with two match registers

2RabbitCore RCM3750
•10/100Base-T RJ-45 Ethernet port
•512K flash memory and 512K SRAM (options for 256K flash memory and 128K SRAM)
•1 Mbyte serial flash memory, which is required to run the optional Dynamic C FAT file
system
•Real-time clock
•Watchdog supervisor
•Provision for customer-supplied backup battery via connections on header J1
•10-bit free-running PWM counter and four pulse-width registers
•Two-channel Input Capture can be used to time input signals from various port pins
•Two-channel Quadrature Decoder accepts inputs from external incremental encoder
modules
•
Four available 3.3 V CMOS-compatible serial ports: maximum asynchronous baud rate
of 2.76 Mbps . Three ports are configurable as a clocked serial port (SPI), and one port
is configurable as an HDLC serial port. Shared connections to the Rabbit microproces-
sor make a second HDLC serial port available at the expense of two of the SPI config-
urable ports, giving you two HDLC ports and one asynchronous/SPI serial port.
•Supports 1.15 Mbps IrDA transceiver
Table 1 below summarizes their main features of the RCM3750.
The RCM3750 is programmed over a standard PC serial port through a programming cable
supplied with the Development Kit, and can also be programed through a USB port with an
RS-232/USB converter or over an Ethernet with the RabbitLink (both available from Rabbit
Semiconuctor).
Appendix A provides detailed specifications for the RCM3750.
Table 1. RCM3750 Features
Feature RCM3750
Microprocessor Rabbit®3000 running at 22.1 MHz
Flash Memory 512K
SRAM 512K
Serial Flash Memory 1 Mbyte
Serial Ports
4 shared high-speed, 3.3 V CMOS-compatible ports:
all 4 are configurable as asynchronous serial ports;
3 are configurable as a clocked serial port (SPI) and 1 is
configurable as an HDLC serial port;
option for second HDLC serial port at the expense of 2
clocked serial ports (SPI)
Input Voltage 4.75–5.25 V DC @175 mA

User’s Manual 3
1.2 Advantages of the RCM3750
•Fast time to market using a fully engineered, “ready-to-run/ready-to-program” micro-
processor core.
•Competitive pricing when compared with the alternative of purchasing and assembling
individual components.
•Easy C-language program development and debugging
•Program download utility (Rabbit Field Utility) and cloning board options for rapid
production loading of programs.
•Generous memory size allows large programs with tens of thousands of lines of code,
and substantial data storage.
•Integrated Ethernet port for network connectivity, with royalty-free TCP/IP software.
•Ideal for network-enabling security and access systems, home automation, HVAC
systems, and industrial controls

4RabbitCore RCM3750
1.3 Development and Evaluation Tools
1.3.1 Development Kit
The Development Kit contains the hardware and software needed to use the RCM3750.
•RCM3750 module.
•RCM3700 Prototyping Board.
•AC adapter, 12 V DC, 1 A (included only with Development Kits sold for the North
American market). A header plug leading to bare leads is provided to allow overseas
users to connect their own power supply with a DC output of 7.5–30 V.)
•Programming cable with 10-pin header and DB9 connections, and integrated level-
matching circuitry.
•Cable kits to access RS-485 and analog input connectors on Prototyping Board.
•Dynamic C CD-ROM, with complete product documentation on disk.
•Getting Started instructions.
•Accessory parts for use on the Prototyping Board.
•Rabbit 3000 Processor Easy Reference poster.
•Registration card.
Figure 1. RCM3750 Development Kit
PROG
DIAG
Programming
Cable
Getting Started
Instructions Prototyping Board
Accessory Parts for
Prototyping Board
AC Adapter
(North American
kits only)
Wiring Cable Kits
Rabbit and Dynamic C are registered trademarks of Rabbit Semiconductor Inc.
RabbitCore RCM3750
Development Kit Contents
The RCM3750 Development Kit contains the following items:
•RCM3750 module.
•RCM3700 Prototyping Board.
•AC adapter, 12V DC, 1 A (included only with Development Kits sold for the North American market).
A header plug leading to bare leads isprovided to allow overseas users to connect their own power
supply with a DC output of 7.5–30 V.)
•Programming cable with 10-pin headerand DB9 connections, and integrated level-matching circuitry.
•Cable kits to access RS-485 and analoginput connectors on Prototyping Board.
•Dynamic C CD-ROM, with complete productdocumentation on disk.
•Getting Startedinstructions.
•Accessory parts for use on the PrototypingBoard.
•Rabbit 3000 Processor Easy Reference poster.
•Registrationcard.
Installing Dynamic C®
Insert the CD from the DevelopmentKit in your PC’s CD-ROM drive. If the instal-
lation does not auto-start,run the setup.exe program in the root directory of the
Dynamic C CD. Install any Dynamic C modules afteryou install Dynamic C.
+V /RESET
DE0
ED2
ED4
ED6
GND
+BKT
/CS
ED1
ED3
ED5
GND GND
A2 A1
D1 D3 D5 D7
GND
A3 A1 D0 D2 D4 D6 GND
+BKT
/CS
ED1
ED3
ED5
GND
GND
A2 A0
D1 D3 D5 D7
2
C1
C2
IR1
R1
R2
R3
R4
Rx
Tx
R5
R6 C3
R9
R7 R8
JP1 J1
+485
GND
485
JP2
R12
R11
U3
C4
C7
C8
C10
R13
C11
U4
C5 C6
C9
J2
GND
/IORD
PB5
PB3
PA0
PA6
PB0
/RES
+5V
PF4
PF6
PC1/PG2
PC0_TXD
PE5
PE1
PG7_RXE
PD4
VBAT
PA4 PA2
/IOWR
PE7
PB4
PB2
PA1
PA3
PA5
PA7
PB7
PF0
PF1
PF5
PF7
PE4
PE0
PD5
PG6
TXE
PC2
TXC
PC3/
PG3
GND
RXC TXC RXE
GND
NC
U1
C12
C13
C15
C14
1
C17 U2 C18
U6
R14
D1
C19
D2
J4
DCIN
+3.3V
GND
+5V
+5V
GND
+3.3V
CD1JB CD1JC
CD1JA
U5
C16
R15 BT1
GND
TXD
RXD
TXE
GND
TCM_SMT_SOCKET
+5V
VBAT PD5 /IORD
PG6_TXE
PE0 PE4 PE7 PC2_TXC
PC0_TXD
PF6
PF4
PB5 PB3 PB0 PF1
PA1
PA3
PA5
PA7
J5
GND
R16
GND
/RES
PD4
/IOWR
PE1
PE5
PC3/PG3
PF7 PF5
PB7
PB4
PB2
PF0
PA0
PA2
PA4
PA6
PG7
RXE
PC1/
PG2
C22
C26R21 R18
C20
R19
C21
R20
R22
JP4
1 2
RP1
CX1 CX2 CX3
CX4
CX5
CX6
CX7
CX8
CX9
CX10CX11
UX2
UX1
U8
R23
C24 C25
C23
U7
C27
R25
R24
C28
R26
R27
R28
R29 JP8
R30 R31 R32 R33 R34 R35 R36
C35
R43
C29
J7
THERMISTOR
R37
J8
VREF
AGND
R44
THERM_IN
AIN
06 05 04 03 02 01 00
AIN
AGND
R38
C30
C31
C32
C33
C34
R39 R40 R41 R42
R48
DS1 DS2
R45
R49
R46
DS3
R47
S3
S2S1
CONVERT
JP5 JP6 JP7
NC
NC
NC
NC NC
NC
+V /RSTET ED0
ED2
ED4
ED6
GND A3 A1 D0 D2 D4 D6
RCM36/37XX SERIES
PROTOTYPING BOARD
RESET

User’s Manual 5
1.3.2 Software
The RCM3750 is programmed using version 0.24 or later of Dynamic C.
Rabbit Semiconuctor also offers for sale other add-on Dynamic C modules including the
popular µC/OS-II real-time operating system, as well as point-to-point protocol (PPP),
Advanced Encryption Standard (AES), and other select libraries. In addition to the Web-
based technical support included at no extra charge, a one-year telephone-based technical
support module is also available for purchase. Visit our Web site at www.rabbit.com or
contact your Rabbit Semiconuctor sales representative or authorized distributor for further
information.
1.3.3 Application Kits
Rabbit Semiconuctor also has application kits featuring the RCM3700 to provide the exact
software and other tools that will enable to tailor your RCM3700 or RCM3750 for specific
applications.
•Secure Embedded Web Application Kit [Part No. 101-0897 (North American markets)
and Part No. 101-0898 (overseas markets)]—comes with three CD-ROMs that have the
Dynamic C RabbitWeb, FAT File System, and Secure Sockets Layer (SSL) modules,
and includes Dynamic C 8.51 or a later version and an RCM3700. This enhanced soft-
ware bundle facilitates the rapid development of secure Web browser interfaces for
embedded system control. Appendix E provides additional information about the
Secure Embedded Web Application Kit.
•Ethernet Connection Kit [Part No. 101-0963 (North American markets) and Part No.
101-0964 (overseas markets)]—comes with one CD-ROM that includes Dynamic C
9.01 or a later version, an RCM3720 module, and an RCM3720 Prototyping Board.
This kit is intended to demonstrate and help you develop Ethernet-based applications.
Visit our Web site at www.rabbit.com or contact your Rabbit Semiconuctor sales represen-
tative or authorized distributor for further information.
1.3.4 802.11b Wi-Fi Add-On Kit
Rabbit Semiconuctor also offers a Wi-Fi Add-On Kit (Part No. 101-0999) for the full line
of RCM3700 modules, including the RCM3750. This Wi-Fi Add-On Kit consists of an
RCM3600–RCM3700 Interposer Board, a Wi-Fi CompactFlash card with a CompactFlash
Wi-Fi Board, a ribbon interconnecting cable, and the software drivers and sample pro-
grams to help you enable the full line of RCM3700 modules with Wi-Fi capabilities. The
RCM3600–RCM3700 Interposer Board is placed between the RCM3750 module and the
Prototyping Board so that the CompactFlash Wi-Fi Board, which holds the Wi-Fi Compact-
Flash card, can be connected to the RCM3750-based system via the ribbon cable provided.
Visit our Web site at www.rabbit.com or contact your Rabbit Semiconuctor sales represen-
tative or authorized distributor for further information.

6RabbitCore RCM3750
1.3.5 Online Documentation
The online documentation is installed along with Dynamic C, and an icon for the docu-
mentation menu is placed on the workstation’s desktop. Double-click this icon to reach the
menu. If the icon is missing, use your browser to find and load default.htm in the docs
folder, found in the Dynamic C installation folder.
Each Dynamic C module has complete documentation available with the online documen-
tation described above.
The latest versions of all documents are always available for free, unregistered download
from our Web sites as well.

User’s Manual 7
2. GETTING STARTED
This chapter describes the RCM3750 hardware in more detail,
and explains how to set up and use the accompanying Prototyp-
ing Board.
NOTE: It is assumed that you have the RCM3750 Development Kit. If you purchased an
RCM3750 module by itself, you will have to adapt the information in this chapter and
elsewhere to your test and development setup.
2.1 Install Dynamic C
To develop and debug programs for the RCM3750 (and for all other Rabbit Semiconductor
hardware), you must install and use Dynamic C.
If you have not yet installed Dynamic C version 0.24 (or a later version), do so now by
inserting the Dynamic C CD from the RCM3750 Development Kit in your PC’s CD-ROM
drive. If autorun is enabled, the CD installation will begin automatically.
If autorun is disabled or the installation otherwise does not start, use the Windows
Start | Run menu or Windows Disk Explorer to launch setup.exe from the root folder
of the CD-ROM.
The installation program will guide you through the installation process. Most steps of the
process are self-explanatory.
Dynamic C uses a COM (serial) port to communicate with the target development system.
The installation allows you to choose the COM port that will be used. The default selec-
tion is COM1. You may select any available port for Dynamic C’s use. If you are not cer-
tain which port is available, select COM1. This selection can be changed later within
Dynamic C.
NOTE: The installation utility does not check the selected COM port in any way. Speci-
fying a port in use by another device (mouse, modem, etc.) may lead to a message such
as "could not open serial port" when Dynamic C is started.
Once your installation is complete, you will have up to three new icons on your PC desk-
top. One icon is for Dynamic C, one opens the documentation menu, and the third is for
the Rabbit Field Utility, a tool used to download precompiled software to a target system.
If you have purchased any of the optional Dynamic C modules, install them after installing
Dynamic C. The modules may be installed in any order. You must install the modules in
the same directory where Dynamic C was installed.

8RabbitCore RCM3750
2.2 Hardware Connections
There are three steps to connecting the Prototyping Board for use with Dynamic C and the
sample programs:
1. Attach the RCM3750 module to the Prototyping Board.
2. Connect the programming cable between the RCM3750 and the workstation PC.
3. Connect the power supply to the Prototyping Board.
The connections are shown for the RCM3700 Prototyping Board, and are similar for the
RCM3720 Prototyping Board.
2.2.1 Attach Module to Prototyping Board
Turn the RCM3750 module so that the Ethernet jack is on the left as shown in Figure 2
below. Insert the module’s J1 header into the TCM_SMT_SOCKET socket on the Proto-
typing Board. The shaded corner notch at the bottom right corner of the RCM3750 module
should face the same direction as the corresponding notch below it on the Prototyping
Board.
Figure 2. Install the RCM3750 Module on the Prototyping Board
NOTE: It is important that you line up the pins on header J1 of the RCM3750 module
exactly with the corresponding pins of the TCM_SMT_SOCKET socket on the Proto-
typing Board. The header pins may become bent or damaged if the pin alignment is off-
set, and the module will not work. Permanent electrical damage to the module may also
result if a misaligned module is powered up.
Press the module’s pins firmly into the Prototyping Board headers.
+V /RESET DE0 ED2 ED4 ED6 GND
+BK T
/CS
ED1 ED3 ED5
GND GND
A2 A1
D1 D3 D5 D7
GND
A3 A1 D0 D2 D4 D6 GND
+BK T
/CS
ED1 ED3 ED5
GND GND
A2 A0
D1 D3 D5 D7
2
C1
C2
IR1
R1
R2
R3
R4
Rx
Tx
R5
R6 C3
R9
R7 R8
JP1 J1
+485
GND
485
JP2
R12
R11
U3
C4
C7
C8
C10
R13
C11
U4
C5 C6
C9
J2
GND
/IORD
PB5
PB3
PA0
PA6
PB0
/RES
+5V
PF4
PF6
PC1/PG2
PC0_TXD
PE5
PE1
PG7_RXE
PD4
VBAT
PA4 PA2
/IOWR
PE7
PB4
PB2
PA1
PA3
PA5
PA7
PB7
PF0
PF1
PF5
PF7
PE4
PE0
PD5
PG6
TXE
PC2
TXC
PC3/
PG3
GND
RXC TXC RXE
GND
NC
U1
C12
C13
C15
C14
1
C17 U2 C18
U6
R14
D1
C19
D2
J4
DCIN
+3.3V
GND
+5V
+5V
GND
+3.3V
CD1JB CD1JC
CD1JA
U5
C16
R15 BT1
GND
TXD
RXD
TXE
GND
TCM_SMT_SOCKET
+5V VBAT PD5 /IORD PG6_TXE PE0 PE4 PE7 PC2_TXC PC0_TXD PF6 PF4 PB5 PB3 PB0 PF1 PA1 PA3 PA5 PA7
J5
GND
R16
GND
/RES
PD4
/IOWR
PE1 PE5
PC3/PG3
PF7 PF5
PB7 PB4 PB2
PF0
PA0 PA2 PA4 PA6
PG7
RXE
PC1/ PG2
C22
C26R21 R18
C20
R19
C21
R20
R22
JP4
1 2
RP1
CX1 CX2 CX3
CX4
CX5
CX6
CX7
CX8
CX9
CX10CX11
UX2
UX1
U8
R23
C24 C25
C23
U7
C27
R25
R24
C28
R26
R27
R28
R29 JP8
R30 R31 R32 R33 R34 R35 R36
C35
R43
C29
J7
THERMISTOR
R37
J8
VREF
AGND
R44
THERM_IN
AIN
06 05 04 03 02 01 00
AIN
AGND
R38
C30 C31
C32 C33
C34
R39 R40 R41 R42
R48
DS1 DS2
R45
R49
R46
DS3
R47
S3
S2S1
CONVERT
JP5 JP6 JP7
NC
NC
NC
NC NC
NC
+V /RSTET ED0 ED2 ED4 ED6 GND A3 A1 D0 D2 D4 D6
RCM36/37XX SERIES PROTOTYPING BOARD
RESET
R37 DS3
J3
4
DS2
DS1
R32
C55
R30
R34
C80
2
R39
R40
C79
Y3
4
1
R44
R46
R45
T1
U4
U6
J2
JP3JP1
C7
U3
U1
R18 C35
RP1
RP2
R24
R36
R2
C25
C34
C33 C30
C32 C31
C83
C84
C81
C26
R15 R16
C27 C82
C28
C29
C41
R6
U5
R11 C37
Y1
C36
C39
R13
R5
JP2
Q1
C10 C40
R14
D1
C50 C51 R27
C49
C53
C54
R29
R26
R31
CAUTION: HOT!
TCM_SMT_SOCKET
Align shaded
corners
RCM 750

User’s Manual 9
2.2.2 Connect Programming Cable
The programming cable connects the RCM3750 to the PC running Dynamic C to down-
load programs and to monitor the RCM3750 module during debugging.
Connect the 10-pin connector of the programming cable labeled PROG to header J2 on
the RCM3750 as shown in Figure 3. Be sure to orient the marked (usually red) edge of the
cable towards pin 1 of the connector. (Do not use the DIAG connector, which is used for a
normal serial connection.)
Figure 3. Connect Programming Cable and Power Supply
NOTE: Be sure to use the programming cable (part number 101-0542) supplied with this
Development Kit—the programming cable has blue shrink wrap around the RS-232 con-
verter section located in the middle of the cable. The simplified programming cable and
adapter board that are supplied with the Ethernet Connection Kit may also be used as
shown in the inset diagram above. Programming cables from other Rabbit Semiconduc-
tor kits are not designed to work with RCM3750 modules.
Connect the other end of the programming cable to a COM port on your PC.
NOTE: Some PCs now come equipped only with a USB port. It may be possible to use
an RS-232/USB converter (Part No. 540-0070) with the programming cable supplied
with the RCM3750 Development Kit. Note that not all RS-232/USB converters work
with Dynamic C.
+V /RESET DE0 ED2 ED4 ED6 GND
+BK T
/CS
ED1 ED3 ED5
GND GND
A2 A1
D1 D3 D5 D7
GND
A3 A1 D0 D2 D4 D6 GND
+BK T
/CS
ED1 ED3 ED5
GND GND
A2 A0
D1 D3 D5 D7
2
C1
C2
IR1
R1
R2
R3
R4
Rx
Tx
R5
R6 C3
R9
R7 R8
JP1 J1
+485
GND
485
JP2
R12
R11
U3
C4
C7
C8
C10
R13
C11
U4
C5 C6
C9
J2
GND
/IORD
PB5
PB3
PA0
PA6
PB0
/RES
+5V
PF4
PF6
PC1/PG2
PC0_TXD
PE5
PE1
PG7_RXE
PD4
VBAT
PA4 PA2
/IOWR
PE7
PB4
PB2
PA1
PA3
PA5
PA7
PB7
PF0
PF1
PF5
PF7
PE4
PE0
PD5
PG6
TXE
PC2
TXC
PC3/
PG3
GND
RXC TXC RXE
GND
NC
U1
C12
C13
C15
C14
1
C17 U2 C18
U6
R14
D1
C19
D2
J4
DCIN
+3.3V
GND
+5V
+5V
GND
+3.3V
CD1JB CD1JC
CD1JA
U5
C16
R15 BT1
GND
TXD
RXD
TXE
GND
TCM_SMT_SOCKET
+5V VBAT PD5 /IORD PG6_TXE PE0 PE4 PE7 PC2_TXC PC0_TXD PF6 PF4 PB5 PB3 PB0 PF1 PA1 PA3 PA5 PA7
J5
GND
R16
GND
/RES
PD4
/IOWR
PE1 PE5
PC3/PG3
PF7 PF5
PB7 PB4 PB2
PF0
PA0 PA2 PA4 PA6
PG7
RXE
PC1/ PG2
C22
C26R21 R18
C20
R19
C21
R20
R22
JP4
1 2
RP1
CX1 CX2 CX3
CX4
CX5
CX6
CX7
CX8
CX9
CX10CX11
UX2
UX1
U8
R23
C24 C25
C23
U7
C27
R25
R24
C28
R26
R27
R28
R29 JP8
R30 R31 R32 R33 R34 R35 R36
C35
R43
C29
J7
THERMISTOR
R37
J8
VREF
AGND
R44
THERM_IN
AIN
06 05 04 03 02 01 00
AIN
AGND
R38
C30 C31
C32 C33
C34
R39 R40 R41 R42
R48
DS1 DS2
R45
R49
R46
DS3
R47
S3
S2S1
CONVERT
JP5 JP6 JP7
NC
NC
NC
NC NC
NC
+V /RSTET ED0 ED2 ED4 ED6 GND A3 A1 D0 D2 D4 D6
RCM36/37XX SERIES PROTOTYPING BOARD
RESET
-pin
power connector
AC Adapter
Reset switch
R37 DS3
J3
4
DS2
DS1
R32
C55
R30
R34
C80
2
R39
R40
C79
Y3
4
1
R44
R46
R45
T1
U4
U6
J2
JP3JP1
C7
U3
U1
R18 C35
RP1
RP2
R24
R36
R2
C25
C34
C33 C30
C32 C31
C83
C84
C81
C26
R15 R16
C27 C82
C28
C29
C41
R6
U5
R11 C37
Y1
C36
C39
R13
R5
JP2
Q1
C10 C40
R14
D1
C50 C51 R27
C49
C53
C54
R29
R26
R31
CAUTION: HOT!
Colored
edge
To
PC COM port
Blue
shrink wrap
PROG
DIAG
PROG
J2
Programming
Cable

10 RabbitCore RCM3750
2.2.3 Connect Power
When all other connections have been made, you can connect power to the Prototyping
Board. Connect the wall transformer to 3-pin header J4 on the Prototyping Board as
shown in Figure 3. The connector may be attached either way as long as it is not offset to
one side.
Plug in the wall transformer. The LED above the RESET button on the Prototyping Board
should light up. The RCM3750 and the Prototyping Board are now ready to be used.
NOTE: A RESET button is provided on the Prototyping Board to allow a hardware reset
without disconnecting power.
2.2.3.1 Overseas Development Kits
Development kits sold outside North America include a header connector that may be
connected to 3-pin header J4 on the Prototyping Board. The connector may be attached
either way as long as it is not offset to one side. The red and black wires from the connec-
tor can then be connected to the positive and negative connections on your power supply.
The power supply should deliver 7.5 V–30 V DC at 5 W.

User’s Manual 11
2.3 Starting Dynamic C
Once the RCM3750 is connected as described in the preceding pages, start Dynamic C by
double-clicking on the Dynamic C icon or by double-clicking on dcrab_XXXX.exe in
the Dynamic C root directory, where XXXX are version-specific characters. Dynamic C
uses the serial port on your PC that you specified during installation.
If you are using a USB port to connect your computer to the RCM3750 module, choose
Options > Project Options and select “Use USB to Serial Converter” under the
Communications tab.
2.4 Run a Sample Program
Use the File menu to open the sample program PONG.C, which is in the Dynamic C
SAMPLES folder. Press function key F9 to compile and run the program. The STDIO win-
dow will open on your PC and will display a small square bouncing around in a box.
2.4.1 Troubleshooting
If a program compiles and loads, but then loses target communication before you can
begin debugging, it is possible that your PC cannot handle the default debugging baud
rate. Try lowering the debugging baud rate as follows.
•Locate the Serial Options dialog in the Dynamic C Options > Project Options >
Communications menu. Choose a lower debug baud rate.
If there are any other problems:
•Check that the RCM3750 is powered correctly — the power LED above the RESET
button on the Prototyping Board should be lit.
•Check to make sure you are using the PROG connector, not the DIAG connector, on the
programming cable.
•Check both ends of the programming cable to ensure that they are firmly plugged into
the PC and the programming port on the RCM3750.
•Ensure that the RCM3750 module is firmly and correctly installed in its connectors on
the Prototyping Board.
•Select a different COM port within Dynamic C. From the Options menu, select
Project Options, then select Communications. Select another COM port from the list,
then click OK. Press <Ctrl-Y> to force Dynamic C to recompile the BIOS. If Dynamic C
still reports it is unable to locate the target system, repeat the above steps until you locate
the active COM port.

12 RabbitCore RCM3750
2.5 Where Do I Go From Here?
If the sample program ran fine, you are now ready to go on to other sample programs and to
develop your own applications. The source code for the sample programs is provided to allow
you to modify them for your own use. The RCM3750 User’s Manual also provides com-
plete hardware reference information and describes the software function calls for the
RCM3750, the Prototyping Board, and the optional LCD/keypad module.
For advanced development topics, refer to the Dynamic C User’s Manual and the
Dynamic C TCP/IP User’s Manual, also in the online documentation set.
2.5.1 Technical Support
NOTE: If you purchased your RCM3750 through a distributor or through a Rabbit Semi-
conductor partner, contact the distributor or partner first for technical support.
If there are any problems at this point:
•Use the Dynamic C Help menu to get further assistance with Dynamic C.
•Check the Rabbit Semiconductor Technical Bulletin Board at
www.rabbit.com/support/bb/.
•Use the Technical Support e-mail form at www.rabbit.com/support/.

Getting Started 13
3. RUNNING SAMPLE PROGRAMS
To develop and debug programs for the RCM3750 (and for all
other Rabbit Semiconductor hardware), you must install and use
Dynamic C.
3.1 Introduction
To help familiarize you with the RCM3750 modules, Dynamic C includes several sample
programs. Loading, executing and studying these programs will give you a solid hands-on
overview of the RCM3750’s capabilities, as well as a quick start with Dynamic C as an
application development tool.
NOTE: The sample programs assume that you have at least an elementary grasp of the C
programming language. If you do not, see the introductory pages of the Dynamic C
User’s Manual for a suggested reading list.
More complete information on Dynamic C is provided in the Dynamic C User’s Manual.
In order to run the sample programs discussed in this chapter and elsewhere in this manual,
1. Your RCM3750 must be plugged in to the Prototyping Board as described in Chapter 2,
“Getting Started.”
2. Dynamic C must be installed and running on your PC.
3. The programming cable must connect the programming header on the Prototyping
Board to your PC.
4. Power must be applied to the RCM3750 through the Prototyping Board.
Refer to Chapter 2, “Getting Started,” if you need further information on these steps.
To run a sample program, open it with the File menu, then compile and run it by pressing
F9 or by selecting Run in the Run menu. The RCM3750 must be in Program Mode (see
Figure 9 on page 30) and must be connected to a PC using the programming cable.

14 RabbitCore RCM3750
The default I/O configuration in the sample programs is based on the RabbitCore module
detected during compile time:
•Any RCM3700 RabbitCore module (except the RCM3720) will have its I/O ports con-
figured for an RCM3700 Prototyping Board.
•An RCM3720 RabbitCore module will have its I/O ports configured for an RCM3720
Prototyping Board.
You may override these default settings to run an RCM3720 RabbitCore module on the
RCM3700 Prototyping Board or to run another RCM3700 RabbitCore module on the
RCM3720 Prototyping Board by adding the following macro to the sample program you
will be running.
•To run an RCM3720 RabbitCore module on an RCM3700 Prototyping Board, add the
following macro at the top of the sample program you will be running.
#define RCM3700_PROTOBOARD
Sample programs that are specifically designed for the RCM3700 Prototyping Board
already have this macro included.
•To run an RCM3700 RabbitCore module (other than the RCM3720) on an RCM3720
Prototyping Board, add the following macro at the top of the sample program you will
be running.
#define RCM3720_PROTOBOARD