Silicon Laboratories C8051F38 Series User manual

Rev. 0.1 11/10 Copyright © 2012 by Silicon Laboratories C8051F38x-DK
C8051F38x-DK
C8051F38XDEVELOPMENT KIT USER’SGUIDE
1. Kit Contents
The C8051F38x Development Kit contains the following items:
C8051F380 Target Board
C8051Fxxx Development Kit Quick-start Guide
Silicon Laboratories IDE and Product Information CD-ROM. CD content includes:
Silicon Laboratories Integrated Development Environment (IDE)
Keil 8051 Development Tools (macro assembler, linker, evaluation “C” compiler)
Source code examples and register definition files
Documentation
C8051F38x Development Kit User’s Guide (this document)
AC to DC Power Adapter
USB Debug Adapter (USB to Debug Interface)
USB Cable
2. Hardware Setup using a USB Debug Adapter
The target board is connected to a PC running the Silicon Laboratories IDE via the USB Debug Adapter as shown
in Figure 1.
1. Connect the USB Debug Adapter to the DEBUG connector on the target board with the 10-pin ribbon cable.
2. Connect one end of the USB cable to the USB connector on the USB Debug Adapter.
3. Connect the other end of the USB cable to a USB Port on the PC.
4. Connect the ac/dc power adapter to power jack P1 on the target board.
Use the Reset button in the IDE to reset the target when connected using a USB Debug Adapter.
Remove power from the target board before removing the ribbon cable from the target board. Connecting or
disconnecting the cable when the devices have power can damage the device and/or the USB Debug Adapter.
Figure 1. Hardware Setup using a USB Debug Adapter
PC
USB
Cable
USB Debug Adapter
AC/DC
Adapter
Target Board
SILICON LABORATORIES
PWR
P1.6
P3.7RESET
Port 4Port 3Port 1
Port 2 Port 0
MCU
Silicon Laboratories
USB DEBUG ADAPTER
Run
StopPower

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3. Software Setup
The included CD-ROM contains the Silicon Laboratories Integrated Development Environment (IDE), Keil software
8051 tools and additional documentation. Insert the CD-ROM into your PC’s CD-ROM drive. An installer will
automatically launch, allowing you to install the IDE software or read documentation by clicking buttons on the
Installation Panel. If the installer does not automatically start when you insert the CD-ROM, run autorun.exe found
in the root directory of the CD-ROM. Refer to the readme.txt file on the CD-ROM for the latest information
regarding known IDE problems and restrictions.
4. Silicon Laboratories Integrated Development Environment
The Silicon Laboratories IDE integrates a source-code editor, source-level debugger and in-system Flash
programmer. The use of third-party compilers and assemblers is also supported. This development kit includes the
Keil Software A51 macro assembler, BL51 linker and evaluation version C51 “C” compiler. These tools can be used
from within the Silicon Laboratories IDE.
4.1. System Requirements
The Silicon Laboratories IDE requirements:
Pentium-class host PC running Windows 2000 or Windows XP.
One available COM or USB port.
64 MB RAM and 40 MB free HD space recommended.
4.2. Assembler and Linker
A full-version Keil A51 macro assembler and BL51 banking linker are included with the development kit and are
installed during IDE installation. The complete assembler and linker reference manual can be found under the Help
menu in the IDE or in the “SiLabs\MCU\hlp” directory (A51.pdf).
4.3. Evaluation C51 “C” Compiler
An evaluation version of the Keil C51 "C" compiler is included with the development kit and is installed during IDE
installation. The evaluation version of the C51 compiler is the same as the full professional version except code
size is limited to 4 kB and the floating point library is not included. The C51 compiler reference manual can be
found under the Help menu in the IDE or in the “SiLabs\MCU\hlp” directory (C51.pdf).
4.4. Using the Keil Software 8051 Tools with the Silicon Laboratories IDE
To perform source-level debugging with the IDE, you must configure the Keil 8051 tools to generate an absolute
object file in the OMF-51 format with object extensions and debug records enabled. You may build the OMF-51
absolute object file by calling the Keil 8051 tools at the command line (e.g. batch file or make file) or by using the
project manager built into the IDE. The default configuration when using the Silicon Laboratories IDE project
manager enables object extension and debug record generation.
Refer to Applications Note AN104 - Integrating
Keil 8051 Tools Into the Silicon Labs IDE
in the “SiLabs\MCU\Documentation\Appnotes” directory on the CD-
ROM for additional information on using the Keil 8051 tools with the Silicon Laboratories IDE.
To build an absolute object file using the Silicon Laboratories IDE project manager, you must first create a project.
A project consists of a set of files, IDE configuration, debug views, and a target build configuration (list of files and
tool configurations used as input to the assembler, compiler, and linker when building an output object file).
The following sections illustrate the steps necessary to manually create a project with one or more source files,
build a program and download the program to the target in preparation for debugging. (The IDE will automatically
create a single-file project using the currently open and active source file if you select Build/Make Project before a
project is defined.)

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4.4.1. Creating a New Project
1. Select ProjectNew Project to open a new project and reset all configuration settings to default.
2. Select FileNew File to open an editor window. Create your source file(s) and save the file(s) with a
recognized extension, such as .c, .h, or .asm, to enable color syntax highlighting.
3. Right-click on “New Project” in the Project Window. Select Add files to project. Select files in the file browser
and click Open. Continue adding files until all project files have been added.
4. For each of the files in the Project Window that you want assembled, compiled and linked into the target build,
right-click on the file name and select Add file to build. Each file will be assembled or compiled as appropriate
(based on file extension) and linked into the build of the absolute object file.
Note: If a project contains a large number of files, the “Group” feature of the IDE can be used to organize.
Right-click on “New Project” in the Project Window. Select Add Groups to project. Add pre-defined groups or
add customized groups. Right-click on the group name and choose Add file to group. Select files to be added.
Continue adding files until all project files have been added.
4.4.2. Building and Downloading the Program for Debugging
1. Once all source files have been added to the target build, build the project by clicking on the Build/Make
Project button in the toolbar or selecting ProjectBuild/Make Project from the menu.
Note: After the project has been built the first time, the Build/Make Project command will only build the files
that have been changed since the previous build. To rebuild all files and project dependencies, click on the
Rebuild All button in the toolbar or select ProjectRebuild All from the menu.
2. Before connecting to the target device, several connection options may need to be set. Open the Connection
Options window by selecting OptionsConnection Options... in the IDE menu. First, select the appropriate
adapter in the “Serial Adapter” section. Next, the correct “Debug Interface” must be selected. C8051F38x family
devices use the Silicon Labs 2-wire (C2) debug interface. Once all the selections are made, click the OK button
to close the window.
3. Click the Connect button in the toolbar or select DebugConnect from the menu to connect to the device.
4. Download the project to the target by clicking the Download Code button in the toolbar.
5. Note: To enable automatic downloading if the program build is successful select Enable automatic connect/
download after build in the ProjectTarget Build Configuration dialog. If errors occur during the build
process, the IDE will not attempt the download.
6. Save the project when finished with the debug session to preserve the current target build configuration, editor
settings and the location of all open debug views. To save the project, select ProjectSave Project As... from
the menu. Create a new name for the project and click on Save.

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5. Example Source Code
Example source code and register definition files are provided in the “SiLabs\MCU\Examples\C8051F38x”
directory during IDE installation. These files may be used as a template for code development. Example
applications include a blinking LED example which configures the green LED on the target board to blink at a fixed
rate. A Universal Serial Bus (USB) application example is also included with the C8051F38x development kit.
5.1. Register Definition Files
Register definition files C8051F380.inc and C8051F380.h define all SFR registers and bit-addressable control/
status bits. They are installed into the “SiLabs\MCU\Examples\C8051F38x” directory during IDE installation. The
register and bit names are identical to those used in the C8051F38x data sheet. Both register definition files are
also installed in the default search path used by the Keil Software 8051 tools. Therefore, when using the Keil 8051
tools included with the development kit (A51, C51), it is not necessary to copy a register definition file to each
project’s file directory.
5.2. Blinking LED Example
The example source files blink.asm and blinky.c show examples of several basic C8051F38x functions. These
include; disabling the watchdog timer (WDT), configuring the Port I/O crossbar, configuring a timer for an interrupt
routine, initializing the system clock, and configuring a GPIO port. When compiled/assembled and linked this
program flashes the green LED on the C8051F380 target board about five times a second using the interrupt
handler with a timer.
5.3. Universal Serial Bus (USB) Application Example
The included USB application example requires Windows 98SE/2000/XP operating system. This example consists
of three parts: firmware running on the C8051F380 device, a USB device driver running on the host PC, and a host
application. The host application communicates with the C8051F380 via USB, allowing the user to view and to
change the state of several I/O peripherals on the C8051F380 target board. The example files can be found in the
“SiLabs\MCU\Examples\C8051F38x\C\USB_INT” directory. Located in this directory is the project file for the
firmware, the USB driver files, and the host application executable. In addition, three subdirectories are provided
that contain the source code for each part of the example application; Host Application Source, Driver Source, and
Firmware. Use the following instructions to set up the example USB firmware, install the USB driver, and then run
the example host application.
After the target board is connected to the host computer via USB, the example application enumerates and sends
data between the target and the host application using Endpoint 0, 1, and 2. The Endpoint 0 packets are control
packets as defined in Chapter 9 of the Universal Serial Bus Specification, version 2.0. Endpoints 1 and 2 are used
for data IN and OUT, respectively. These data packets consist of 8 bytes used to denote the current status of the
buttons, LEDs, Potentiometer, and logic levels of various port pins on the target board. Accessing the USB core
(i.e., accessing the USB registers and moving data to and from the Endpoint FIFOs on the target board) is
documented in Silicon Laboratories’ C8051F38x data sheet.

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5.3.1. Setting-up the Firmware
1. Set up the hardware on the C8051F380 target board according to the instructions in Section 2.
2. Create a project using the following steps.
a. Open the Silicon Laboratories IDE.
b. Click on the ProjectOpen Project... option in the IDE menus.
c. Answer No to the following message:
d. Not all project windows can be restored if not connected.
Do you want to connect now?
e. Select the USB__Int.wsp project, located by default in the
SiLabs\MCU\Examples\C8051F38x\C\USB_INT directory, and click the Open button.
f. Click the Build/Make Project button in the IDE toolbar.
g. The project should now be compiled and linked successfully, with no errors.
h. Connect to the device by clicking the Connect button on the IDE toolbar.
i. Download the project to the target by clicking the Download Code button in the IDE toolbar.
3. Begin program execution on the target by either of the following methods:
a. Click the Go button in the IDE toolbar.
b. Disconnect the IDE from the device by pressing the Disconnect button on the toolbar. Next, press the
Reset button on the C8051F380 target board.
5.3.2. Installing the USB Driver
1. Connect the USB cable between the host computer and the C8051F380 target board, as shown in Figure 2.
See Figure 2 on page 6 for the location of the USB connector.
2. At this point, Windows should notify you it has found new hardware and prompt you with a Found New
Hardware wizard. Press the Next button.
3. Select Search for a suitable driver for my device (recommended) and press the Next button.
4. Select Specify a location under “Optional search locations:” and press the Next button.
5. Press the Browse button to locate the SiLabsInt.inf driver installation file, located by default in the
“SiLabs\MCU\Examples\C8051F38x\C\USB_INT” directory. Once this file is selected press the OK button.
6. Verify that the correct path and filename are shown and press the Next button.
7. Press the Finish button.
5.3.3. Running the Host Application
1. Once firmware has been downloaded to the target board and the driver has been installed successfully, run the
USBTest.exe example application located by default in the “SiLabs\MCU\Examples\C8051F38x\C\USB_INT”
directory.
2. The USBTest application will display the status of the potentiometer, the temperature sensor, the two switches,
and the lower four bits of Port 0.
3. The application also includes check boxes for turning on the two LEDs and changing the logic levels on the
lower four bits of Port 1.
4. If any of the application functions do not operate correctly, verify shorting blocks are installed at the following
positions: J3[1-2] (P2.0 Switch), J3[3-4] (P2.1 Switch), J3[5-6] (P2.2 LED), J3[7-8] (P2.3 LED), and J16 and J17
(P2.5 Potentiometer).
5. See Figure 2 on page 6 for the location of headers, LEDs, switches, and potentiometer.
Note: The C8051F380 target board has the ability to be powered through the USB cable. To enable the USB powered mode,
short the pins labeled VBUS and VREGIN on the J8 header. Do not short all 3 pins on the J8 header.

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6. Target Board
The C8051F38x Development Kit includes a target board with a C8051F380 device pre-installed for evaluation and
preliminary software development. Numerous input/output (I/O) connections are provided to facilitate prototyping
using the target board. Refer to Figure 2 for the locations of the various I/O connectors.
P1 Power connector (accepts input from 7 to 15 VDC unregulated power adapter)
P2 Analog I/O terminal block
P3 USB connector
P4 RS232 connector
J1 Supply signal header
J2 Port 0 header
J3 Port 1 header
J4 Port 2 header
J5 Port 3 header
J6 Port 4 header
J7 Connects the +3V supply net to the VDD supply net
J8 USB Power or VDD power selection header
J9 Debug connector for debug adapter interface
J10, J11 External crystal enable connectors
J12 Port I/O jumper configuration block
J13 96-pin female connector
J15 Jumper connection for pin 1.5 to capacitors (used when VREF is internally generated)
J16 Jumper connection for potentiometer source to VDD
J17 Jumper connection for potentiometer to pin 2.5
J19 Serial Adapter target board power connector
Figure 2. C8051F380 Target Board
C8051F380-TB
DEBUG
J9
P1
RESET
P2.0
P2.1
J6
J5
J4
J3
J1
J15
J11
J12
J8
J2
J19
380
J16
J17
USB
P3
P4
RS232
PWR
SILICON LABORATORIES
J10
J7
D4
D3
D2
U1
J13
P2
SW3 SW2 SW1
R10

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6.1. System Clock Sources
The C8051F380 device installed on the target board features a calibrated programmable internal oscillator which is
enabled as the system clock source on reset. After reset, the internal oscillator operates at a frequency of 1.5 MHz
(±1.5%) by default but may be configured by software to operate at other frequencies. Therefore, in many
applications an external oscillator is not required. However, if you wish to operate the C8051F380 device at a
frequency not available with the internal oscillator, an external crystal may be used. Refer to the C8051F38x data
sheet for more information on configuring the system clock source.
The target board is designed to facilitate the installation of an external crystal. Remove shorting blocks at headers
J10 and J11 and install the crystal at the pads marked Y1. Install a 10 Mresistor at R1 and install capacitors at C6
and C7 using values appropriate for the crystal you select. Refer to the C8051F38x data sheet for more information
on the use of external oscillators.
6.2. Switches and LEDs
Three switches are provided on the target board. Switch RESET is connected to the RESET pin of the C8051F380.
Pressing RESET puts the device into its hardware-reset state. Switches P2.0 and P2.1 are connected to the
C8051F380’s general purpose I/O (GPIO) pins through headers. Pressing P2.0 or P2.1 generates a logic low
signal on the port pin. Remove the shorting blocks from the J12 header to disconnect Switch P2.0 and Switch P2.1
from the port pins. The port pin signals are also routed to pins on the J1 I/O connector. See Table 1 for the port pins
and headers corresponding to each switch.
Three LEDs are also provided on the target board. The red LED labeled PWR LED is used to indicate a power
connection to the target board. The green surface-mount LEDs labeled with port pin names are connected to the
C8051F380’s GPIO pins through headers. Remove the shorting blocks from the header to disconnect the LEDs
from the port pin. The port pin signals are also routed to pins on the J1 I/O connector. See Table 1 for the port pins
and headers corresponding to each LED.
Also included on the C8051F380 target board is a 10 kThumb-wheel Rotary Potentiometer, part number R10.
The Potentiometer is connected to the C8051F380’s P2.5 pin through the J17 header. Remove the shorting block
from the header to disconnect the Potentiometer from the port pin. The port pin signal is also routed to a pin on the
J1 I/O connector. See Table 1 for the port pin and header corresponding to the Potentiometer.
Table 1. Target Board I/O Descriptions
Description I/O Header
SW1 Reset none
SW2 P2.0 J12[1–2]
SW3 P2.1 J12[3–4]
Green LED P2.2 J12[5–6]
Green LED P2.3 J12[7–8]
Red LED PWR none
Potentiometer P2.5 J17

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6.3. Universal Serial Bus (USB) Interface (J14)
A universal serial bus (USB) connector (P3) is provided to facilitate connections to the USB interface on the
C8051F380. Table 2 shows the J14 pin definitions.
6.4. PORT I/O Connectors (J2 - J6)
In addition to all port I/O signals being routed to the 96-pin expansion connector, each of the five parallel ports of
the C8051F380 has its own 10-pin header connector. Each connector provides a pin for the corresponding port
pins 0–7, +3.3 VDC and digital ground. Table 3 defines the pins for the port connectors. The same pin-out order is
used for all of the port connectors.
6.5. USB Self-powered Configuration (J8)
The C8051F380 target board can be configured as a self-powered USB device to take power from the USB cable
instead of the ac/dc adapter connected at P1. To configure the target boards as a self-powered USB device, short
the VREGIN and VBUS pins on the J8 header
Note: When the C8051F380 target board is self-powered from the USB, the Serial Adapter is not powered from the target
board. The Serial Adapter must be powered directly by connecting the ac/dc adapter to the Serial Adapters’ dc power
jack. Also, the RS232 Serial Interface (P4) cannot be used when powering the target board from the USB.
Table 2. USB Connector Pin Descriptions
Pin # Description
1 VBUS
2D-
3D+
4 GND (Ground)
Table 3. J12–J19 Port Connector Pin Descriptions
Pin # Description
1Pn.0
2Pn.1
3Pn.2
4Pn.3
5Pn.4
6Pn.5
7Pn.6
8Pn.7
9 +3VD(+3.3VDC)
10 GND (Ground)

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6.6. Target Board DEBUG Interface (J9)
The DEBUG connector (J9) provides access to the DEBUG (C2) pins of the C8051F380. It is used to connect the
Serial Adapter or the USB Debug Adapter to the target board for in-circuit debugging and Flash programming.
Table 4 shows the
DEBUG pin definitions.
6.7. Serial Interface (P4)
A RS232 transceiver circuit and DB-9 (P4) connector are provided on the target board to facilitate serial
connections to UART0 of the C8051F380. The TX, RX, RTS and CTS signals of UART0 may be connected to the
DB-9 connector and transceiver by installing shorting blocks on header J12.
J12[9-10] Install shorting block to connect UART0 TX (P0.4) to transceiver.
J12[11-12] Install shorting block to connect UART0 RX (P0.5) to transceiver.
J12[13-14] Install shorting block to connect UART0 RTS (P2.6) to transceiver.
J12[15-16] Install shorting block to connect UART0 CTS (P2.7) to transceiver.
6.8. Analog I/O (P2)
Several of the C8051F380 target device’s port pins are connected to the P2 terminal block. Refer to Table 5 for the
P2 terminal block connections.
6.9. USB Debug Adapter Target Board Power Connector (J19)
The USB Debug Adapter includes a connection to provide power to the target board. This connection is routed
from J9[10] to J19[SER_PWR]. Place a shorting block at header J19[REG_IN-P1_PWR] to power the board
directly from an ac/dc power adapter. Place a shorting block at header J19[REG_IN-SER_PWR] to power the
board from the USB Debug Adapter. Please note that the second option is not supported with either the EC1 or
EC2 Serial Adapters.
Table 4. DEBUG Connector Pin Descriptions
Pin # Description
1 +3VD(+3.3VDC)
2, 3, 9 GND (Ground)
4C2D
5/RST(Reset)
6P3.0
7C2CK
8 Not Connected
10 USB Power
Table 5. J6 Terminal Block Pin Descriptions
Pin # Description
1 P1.1 / AIN1.1
2 P1.2 / AIN1.2
3 GND (Ground)
4 P1.5 / VREF (Voltage Reference)

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7. Schematics
Figure 3. C8051F380 Target Board Schematic (Page 1 of 2)