Renesas R0K5R8C3MDU30BR User manual

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APPLICATION NOTE
R01AN1051EJ0100 Rev.1.00 Page 1 of 38
Mar 21, 2012
R8C/3MK Group
USB-to-Serial Communication Conversion Demo Board
R0K5R8C3MDU30BR Instruction Manual
Introduction
This document is an instruction manual for the R0K5R8C3MDU30BR that enables USB-to-Serial communication
conversion using the USB Peripheral function and serial communication function in R8C/3MK Group MCUs.
Target Device
R8C/3MK Group
Contents
1. Preface .............................................................................................................................................. 2
2. Important ........................................................................................................................................... 3
3. Precautions for Safety....................................................................................................................... 5
4. Demo Board Functions ..................................................................................................................... 8
5. Related Documents........................................................................................................................... 8
6. Demo Board Description ................................................................................................................... 9
7. Setting up the Demo Board............................................................................................................. 12
8. Operating Instructions ..................................................................................................................... 15
9. I2C demo communication protocol .................................................................................................. 23
10. SSU demo communication protocol................................................................................................ 28
11. Circuit Diagram................................................................................................................................ 34
12. Parts Layout Diagram ..................................................................................................................... 34
13. Parts List ......................................................................................................................................... 34
R01AN1051EJ0100
Rev.1.00
Mar 21, 2012

R8C/3MK Group USB-to-Serial Communication Conversion Demo Board
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Mar 21, 2012
1. Preface
This document provides hardware setting instructions, operating instructions and usage notes for the
R0K5R8C3MDU30BR to enable USB-to-Serial communication conversion using the USB Peripheral function and
serial communication function in R8C/3MK Group MCUs.
Before using the demo board, please refer to ”7.1 Bundled Accessories Confirmation” to confirm you have all
accessories bundled with the demo board package. If you have any questions concerning the demo board, please contact
the closest Renesas Electronics Corp., Renesas Solutions Corp., or Renesas Electronics Sales Corp. office.

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2. Important
Before using this product, be sure to read this instruction manual carefully. Keep this manual, and refer to it when you
have questions about this product.
Product:
"Product" in this document collectively refers to the following products manufactured by Renesas Electronics
Corporation
(1) R8C/3MK Group USB - to - Serial Communication Conversion Demo Board R0K5R8C3MDU30BR
"Product" herein encompasses neither the customer's user system nor the host machine.
Purpose of use of the product:
This product is a demonstration board to use USB - to -Serial Communication function with R8C/3MK Group MCU.
Be sure to use this product correctly according to said purpose of use. Please avoid using this product other than for
its intended purpose of use.
For those who use this product:
This product can only be used by those who have carefully read this instruction manual and know how to use it.
Use of this product requires basic knowledge of electric circuits, logical circuits, and MCUs.
When using this product:
(1)In no event shall Renesas Electronics Corporation be liable for any consequence arising from the use of this
product.
(2)Renesas Electronics Corporation strives to provide workarounds for and correct trouble with products
malfunctions, with some free and some incurring charges. However, this does not necessarily mean that Renesas
Electronics Corporation guarantees the provision of a workaround or correction under any circumstances.
(3)This product covered by this document has been developed on the assumption that it will be used for evaluation in
laboratories. Therefore, it does not fall within the scope of applicability of the Electrical Appliance and Material
Safety Law and protection against electromagnetic interference when used in Japan.
(4)Renesas Electronics Corporation cannot predict all possible situations and possible cases of misuse that carry a
potential for danger. Therefore, the warnings in this instruction manual and the warning labels attached to this
product do not necessarily cover all such possible situations and cases. The customer is responsible for correctly
and safely using this product.
(5)The product covered by this document has not been through the process of checking conformance with UL or other
safety standards and IEC or other industry standards. This fact must be taken into account when the product is
taken from Japan to some other country.
(6)This product is a product used for development and an evaluation stage. It cannot include in a user's product and
cannot mass-produce.
(7)Even if it is the case where fault is in the device carried in this product, it does not exchange for the fault repair
article of a device.
(8)Operation with all USB host devices cannot be guaranteed. And Connection to all serial communication devices
cannot be guaranteed.
(9)The Application Notes of this product are all references, and no one to guarantee the operation.

R8C/3MK Group USB-to-Serial Communication Conversion Demo Board
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Usage restrictions:
This product has been developed as a means of supporting system development by users. Therefore, do not use it as
an embedded device in other equipment. Also, do not use it to develop systems or equipment for use in the
following fields.
(1) Transportation and vehicular
(2) Medical (equipment that has an involvement in human life)
(3) Aerospace
(4) Nuclear power control
(5) Undersea repeaters
If you are considering the use of this product for one of the above purposes, please be sure to consult your local
distributor.
About product changes:
We are constantly making efforts to improve the design and performance of our product. Therefore, the
specification or design of the product, or this user's manual, may be changed without prior notice.
About rights:
(1) We assume no responsibility for any damage or infringement on patent rights or any other rights arising from the
use of any information, products or circuits presented in this user’s manual.
(2) The information or data in this user’s manual does not implicitly or otherwise grant a license to patent rights or any
other rights belonging to Renesas or to a third party.
(3) This user’s manual and this product are copyrighted, with all rights reserved by Renesas. This user’s manual may
not be copied, duplicated or reproduced, in whole or part, without prior written consent from Renesas.
About diagrams:
Some diagrams in this user’s manual may differ from the objects they represent.
Warranty:
Renesas will exchange this board free of charge only due to manufacturing defects.

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3. Precautions for Safety
3.1 Definitions of Signal Words
This chapter describes the precautions which should be taken in order to use this product safely and properly. Be sure to
read and understand this chapter before using this product.
Contact us if you have any questions about the precautions described here.
This chapter describes the precautions which should be taken in order to use this product safely and properly. Be sure to
read this chapter before using this product.
WARNING
WARNING indicates a potentially dangerous situation that will cause death or heavy
wound unless it is avoided.
CAUTION
CAUTION indicates a potentially dangerous situation that will cause a slight injury or
a medium-degree injury or property damage unless it is avoided.
In addition to the two above, the following are also used as appropriate to indicate additional precautions.
[Notice] Point out the attention for the malfunction by wrong setting.
△means WARNING or CAUTION.
Example:
CAUTION AGAINST AN ELECTRIC SHOCK
means PROHIBITION.
Example:
DISASSEMBLY PROHIBITED
●means A FORCIBLE ACTION.
Example:
UNPLUG THE POWER CABLE FROM THE RECEPTACLE.

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3.2 Warning
WARNING
Warnings for Power Supply:
This product CAN NOT use external power supply from header pins. The demo board may incur
damage.
Do not touch the plug of the power cable when your hands are wet. This may cause electric
shock.
Power and Ground terminals are also on the rear surface of this product. They should Not be in
contact with a conductive material directly.
When installing this equipment, insure that a reliable ground connection is maintained.
If you smell a strange odor, hear an unusual sound, or see smoke coming from this product, then
disconnect power immediately Do not use this as it is because of the danger of electric shock
and/or fire. In this case, contact your local distributor.
Before setting up this product and connecting it to other devices, turn off power or remove a
power cable to prevent injury or product damage.
Warnings to Be Taken for Handling:
Do not break down this product. Breaking down the product will void your warranty.
Warning for Installation:
Do not set this product in water or areas of high humidity. Make sure that the product does not
get wet. Spilling water or some other liquid into the product may cause un-repairable damage.
Warning for Use temperature:
This equipment is to be used in an environment with a maximum ambient temperature of 35°C.
Care should be taken that this temperature is not exceeded.

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3.3 Caution
CAUTION
Cautions to Be Taken for Handling This Product:
Use caution when handling the product. Be careful not to apply a mechanical shock.
Do not touch the connector pins of this product directly. Static electricity may damage the
internal circuits.
When attaching and removing the cable, hold the plug of the cable and do not pull on the cable.
Do not pull this product by the communications interface cable. Excessive flexing or force may
break conductors.
When you connect an external board to this product through test pins, be careful not to short
signal lines or between power line and ground. If this product is revised by the user, operation
cannot be guaranteed.
Note on Transporting the Product:
When sending your product, use the packing box and cushioning material supplied with the
product when it was delivered to you and specify caution in handling (handling as precision
equipment). If packing of your product is not complete, it may be damaged during transportation.
When you pack your product in a bag, make sure to use the conductive plastic bag supplied with
the product. If you use a different bag, it may lead to further trouble with your product due to
static electricity.
Caution to Be Taken for Disposal:
Penalties may be applicable for incorrect disposal of this waste, in accordance with your national
legislation.
European Union regulatory notices:
The WEEE (Waste Electrical and Electronic Equipment) regulations put responsibilities on
producers for the collection and recycling or disposal of electrical and electronic waste. Return of
WEEE under these regulations is applicable in the European Union only. This equipment
(including all accessories) is not intended for household use. After use the equipment cannot be
disposed of as household waste, and the WEEE must be treated, recycled and disposed of in an
environmentally sound manner.
Renesas Electronics Europe GmbH can take back end of life equipment, register for this service
at “http://www.renesas.eu/weee”.

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4. Demo Board Functions
With the MCU and the board circuits, this demo board can be used for the following.
USB-to-UART communication conversion function (program already written to MCU)
USB-to-UART/USB-to-I2C/USB-SSU communication conversion function (provided via downloading module)
Rewrite internal program ROM via USB (downloader program already written to MCU)
Supports bus-powered (regulator from 5V to 3.3V) system power supply
5. Related Documents
Please refer to the following manuals and application note as needed when using the demo board.
•R8C/3MU Group, R8C/MK Group Users Manual Hardware Version
Download from here:
http://www.renesas.com/products/mpumcu/r8c/Documentation.jsp
•R8C/USB Group USB Downloader (r01an0703ej_r8cusbfdl.pdf)
Please contact your Renesas sales or representative office to obtain this document.
•Renesas USB Device USB Peripheral Communications Devices Class Driver (PCDC)
(r01an0555ej_r8cusbpcdc.pdf)
Please contact your Renesas sales or representative office to obtain this document.

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6. Demo Board Description
6.1 Demo Board Specification
Figure 1 and Figure 2 show external views of the front and back of the demo board.
Figure 1 R0K5R8C3MDU30BR Board (Top View)
Figure 2 R0K5R8C3MDU30BR External View (back)
LED (Green)
R8C/3MK
MCU
USB receptacle
(mini B)
USB Downloader
function switch pin
External connection
pins (J3)
Ceramic
oscillator
Regulator
(from VBUS)
External connection
pins (J3)
External connection
pins (J1, J2)

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Table 1 shows the key components embedded on the demo board. Please refer to “Appendix 3. Component
List” for a detailed description of all components. Table 2 shows the operating environment, power
specifications and dimensions of the demo board.
Table 1 R0K5R8C3MDU30BR Key Components Specifications
Item Specification
MCU R5F213MCKNNP (R8C/3MK Group)
Program ROM: 128KB Data Flash ROM: 4KB RAM: 10KB
External clock Ceramic oscillator(12MHz): CSTCE12M0GH5L-**R0 (Murata Mfg. )
USB Functions Peripheral function supporting MCU built-in USB 2.0-compliant Full-speed
Receptacle Mini B: UX60SC-MB-5ST (Hirose)
Power supply regulator MIC5353-3.3YMT (Micrel)
Table 2 R0K5R8C3MDU30BR Power Supply, Dimensions, Environment Specifications
Item Specification
Usage Environment
Conditions
Temperature: 5 to 35℃
Humidity level: no condensation
Surrounding gas: no corrosive gas
Operating Voltage and
Supply Source
Power supply voltage: 3.3V
Power supply source: USB VBUS (3.3V conversion via the regulator)
Power and Ground terminals are also on the rear surface of this product.
They should Not be in contact with a conductive material directly.
This product CAN NOT use external power supply from J1, J2 and J3.
Because of collision between the external power supply and the power
from USB VBUS, possibly causing damage to the external
serial device, the USB Host device, and the demo board.
External Dimensions 34mm X 12mm (excluding protrusions, cords, etc.)

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6.2 Function Overview
Figure 3shows the functional block diagram for the demo board, followed by a brief description of each
function.
Figure 3 R0K5R8C3MDU30BR Functional Block Diagram
6.2.1 USB Peripheral
The demo board mounts a mini-B receptacle so that the MCU’s built-in USB module can be used as a
Peripheral device. The board also mounts a ceramic oscillator as the built-in USB’s external oscillating
device.
6.2.2 External Serial Communication Device Connector
The demo board has connectors (J1, J2, J3) on the front left edge and back surface for connection to
external serial communication devices with header pins. Pins drawn out to J1, J2, and J3 are UART (TxD0,
RxD0), SSU/I2C (SCS, SSI, SSO/SDA, SSCK/SCL), and power supply/GND, as shown in Figure 3. For
detailed instructions on how to attach the header pin to J3, see “7.2 Header Pin Attachment”; for details
concerning connection with the external serial communication device, see “7.3 External Serial Device
Connection.”
6.2.3 Power Supply
The demo board can be powered from USB VBUS (bus-powered).The board includes a power regulator
for converting the VBUS power (5V) to 3.3V.
Do not supply power from an external serial communications device. Doing so may cause damage due to a
collision with the VBUS power supply.
6.2.4 USB Downloader
The demo board includes a USB downloader function as a method of rewriting the user program in the
MCU built-in flash ROM area. When power is supplied to the demo board, this function automatically will
be started while the function switch pin (TP1) is connected to GND. For more details on how to use this
function, please refer to “8.2 USB Downloader Function.”
5V->3.3V
regulator
VBUS
USB MiniB
USB_VCC VCC
R8C/3MK
40Pin QFN
D+
D-
TxD0
RxD0
VCC
Oscillator
SSCK/SCL
SSO/SDA
SSI
SCS
12MHz
External connectors
J1,J2,J3
USB downloader
Function switch pin
TP1
MODE
RESET
External connector
J2

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Mar 21, 2012
7. Setting up the Demo Board
7.1 Bundled Accessories Confirmation
Please confirm that you have all bundled accessories before using this demo board. Figure 4 shows a picture of
the board and the header pin; Table 3 lists all accessories and corresponding quantities that come with the
demo board package. The header pin is for use with J3; please mount on the board as needed. The system
definition (Inf) file and the upgrade application software (mot) are provided as electronic data, and can be
downloaded from Renesas web site (for more details, please see Release Note). Please refer to “8.Operating
Instructions” to check the usage of these files.
Table 3 Bundled Accessories & Quantity
Figure 4 Circuit Board and Header Pin (for J3)
Do not supply power from an external serial communications device. Doing so may cause damage due to a
collision with the VBUS power supply.
Component Name QTY
Circuit Board (R0K5R8C3MDU30BR) 1
2.54-mm pitch, 2-row right angle
Header pin (J3)
1
Release Note (English/Japanese) 1
System definitions file (CDC_demo.inf) 1
Upgrade application software
(pcdcfw.mot)
1
Instruction Manual (this document) 1

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7.2 Header Pin Attachment
Attach the right angle section of the bundled header pin (FFC-8LBMEP1B, Honda Tsushin Kogyo) to the
holes (J3) on the left edge of the board as shown in Figure 5. Figure 6shows an attachment example. A user-
provided header pin can also be attached to J3; the required dimensions are 2.54-mm pitch, 2-row, 8-pin
header pin.
Figure 5 J3 Header Pin Attachment Position
Figure 6 Example of Bundled Header Pin Attached to J3
7.3 External Serial Communications Device Connection
The demo board uses J1, J2, and J3 as connectors for external serial communications devices. Figure 7 and
Figure 8 show the positioning of the signal lines and power supply/GND connected through for J1, J2 and J3.
Table 4 shows the relation of the connector pin No. and the MCU functions. Refer to “Appendix 1 Circuit
Diagram” for more details about the MCU wiring.
Power and Ground terminals are also on the rear surface of this product.
They should Not be in contact with a conductive material directly.

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Mar 21, 2012
Figure 7 Positioning of Signal Lines and Power Supply/GND Connected to J1/J2
Figure 8 Positioning of Signal Lines and Power Supply/GND Connected to J3
Table 4 Relation of connector pin No. and MCU functions
Terminal name J1 pin J2 pin J3 pin UART I2C SSU
GND - 1 1 GND GND GND
RxD0 - 2 2 RxD0 -
TxD0 - 3 3 TxD0 -
SSO/SDA 1 - 4 - SDA SSO
SCS 5 - 5 - - SCS
SSI 4 - 6 - - SSI
SSCK/SCL 3 - 7 - SCL SSCK
VCC 2 - 8 VCC VCC VCC
RESET - 4 - - - -
MODE - 5 - - - -
SSO/SDA VCC SSCK/SCL SSI SCS
GND
RxD0
SSO/SDA VCC
SSCK/SCL
SSI
SCS
TxD0
GND RxD0 TxD0 RESET MODE

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8. Operating Instructions
Application software for USB-to-Serial communication conversion has been installed in the MCU flash ROM
mounted on this demo board. The serial driver at shipping is UART function. You can use USB-to-UART
conversion.
This product also implements the downloader function via USB to update application software. If the user
updates the upgrade USB-to-serial communication conversion application software released individually
(Refer to 8.3), it is possible to communicate not only the UART device but also the I2C devices or the 4-wire
bus communication device (hereinafter called SSU device) to SSU in the R8C/3MK MCU.
As shown in Figure 9, if TP1 of this product is open when power is turned on, the application runs as the USB-
to-serial communication conversion function. When TP1 is short to “GND”, the USB download function is
enabled. Refer to ”7.3 External Serial Device Connection” for the detail about the connection with the external
serial communication device.
Figure 9 Close-up of TP1 on Circuit Board
8.1 USB-to-UART Communication Conversion Function (pre-installed version)
. Application software for USB–to-UART communication conversion has been installed at shipping. Figure 10
shows the switching sequence between the USB-to-UART communication conversion function and USB
downloader function
Figure 10 USB-to-UART Communication Function / USB Downloader Function Switching Sequence
Turn on power
Confirm
TP1state
USB
downloader
f
u
n
ct
i
o
n
USB–to-UART
communication
conversion function
TP1 = GND TP1 = Open

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The following outlines the process until communication is achieved using the terminal software on the PC. For
more details, refer to the application note titled “Renesas USB Device USB Peripheral Communications
Devices Class Driver (PDCD).”
1) Connection to USB Host (PC)
(1) Connect the demo board to the USB Host (PC) using the USB cable (A-miniB).
(System definition file (CDC_Demo.inf) is required for the initial connection.)
(2) Confirm the COM number (Windows: device manager)
2) Start up Terminal Software
(1) Enter the confirmed COM number in the terminal software.
(2) Set the communication speed
Set baud rate from 4800bps to57600bps.
(3) Set all other parameters for serial port
Set the following setting
Data length: 8 bits; parity: none; stop bit: 1 bit; flow control: none
The example of data communication with a RS232C transceiver as an external UART device is shown in
Figure 11. Figure 12 shows the example of the setting parameters for serial port on the terminal software.
UART
communication
Terminal software
Text screen
1."ABCDefg”
2."12345678"
RS232C
Seriial PORT
Terminal software
Text screen
Text Data
1. "ABCDefg”
2. "12345678"
Text Data
UART0
USB
USB
1. "ABCDefg”
2."12345678"
USB
communication
USB CDC
Host Device
UART
communication
This Product
Text Data
1. "ABCDefg”
2. "12345678"
Text Data
RS232C
RS232C
communication PC with
RS232C serial
port
RS232C
Transceiver
UART
Text Data
1. "ABCDefg”
2. "12345678"
Text Data
Figure 11 Example of Data Communication using USB-to-UART Communication Conversion

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RXD
PC with
RS232C Serial
Port
Control Transfer
Class Request
USB
USB
USB
Communication
USB CDC
Host
RS232C
Communication
RS232C
Seriial PORT
The serial port parameters on the
terminal software reflect UART0.
UART
Device with
UART serial
port
TXD
RS232C
Transceiver
RS232C
This Product
UART0
UART
This product does not use control
signals of CTS/RTS/DSR/DTR etc.
Figure 12 Example of setting the serial port parameters on the terminal software
8.2 USB Downloader Function
When the demo board is turned on while the USB downloader function switch pin (TP1) is grounded (GND),
the USB downloader program is started up. In this function, the user can write a Motorola S Format (mot) file
to the MCU internal flash ROM. The following outlines the sequence until the internal program has been
updated. For more details, refer to the application note titled “R8C/USB Group USB Downloader.”
1) Connection to USB Host (PC)
Connect this demo board to the USB Host (PC) using the USB cable (A-miniB).
(System definition file (CDC_Demo.inf) is required for the initial connection.)
(2) Confirm the COM number (Windows: device manager)

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2) Start up Terminal Software
(1) Enter the confirmed COM number in the terminal software. As this function enables serial communication,
you do not need to set the communication speed, data length, etc.
(2) Nothing can be displayed immediately after startup, so you will need to display the operating menu with the
M[CR] command.
If communications are running properly, the information in Figure 13 will be displayed on the screen.
Figure 13 Terminal Software Display using M[CR] Command
3) Erase flash ROM data on the MCU
(1) Enter E[CR] command to start the flash ROM erase.
The “Erase complete” display shown in Figure 14 indicates the erase has been completed.
Figure 14 Terminal Software Display when MCU Flash ROM Data Erase is Complete
4) Write program
(1) Enter W[CR] command to send the target Motorola S Format file from the Terminal software. When the
display shown in Figure 15 appears on screen, the Write process has been completed.
Figure 15 Terminal Software Display after Program Write Completion
5) Restart program
After the program has been rewritten, the following two methods can be used to restart the program.
1) Enter the G[CR] Command
2) Remove the USB cable and power up the demo board with TP1 left open.
.
The program writing will be failure if this demo board is unplugged from PC when the program
writing is executing. Please execute the program writing processing described in
“8.2 USB Downloader Function” again, if the program writing is failure."
Renesas USB Flash Sample
Press Command
M[CR] - Menu Display(these)
E [CR] - Erase Flash ROM
W[CR] - Write User Program
G[CR] - Go User Program
Erase Flash ROM start…
Erase complete
Please send a mot file
Write complete

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8.3 USB-to-Serial Communication Conversion Function (the upgrade version)
After this upgrade application software is installed by using the USB downloader, it is possible to connect not
only the UART device but also the I2C devices or the SSU device.
Figure 16shows the switching sequence between the USB-to-Serial communication conversion function and
USB downloader function.
Figure 16 USB–to-Serial Communication Function/USB Downloader Function Switching Sequence USB
The following outlines the process until communication is achieved using the terminal software on the PC.
1) Connection to USB Host (PC)
(1) Connect the demo board to the USB Host (PC) using the USB cable (A-miniB).
(System definition file (CDC_Demo.inf) is required for the initial connection.)
(2) Confirm the COM number (Windows: device manager)
2) Start up Terminal Software
(1) Enter the confirmed COM number in the terminal software. For the first step is selecting serial function
(UART ,SSU or I2C) , you do not need to set the communication speed, data length, etc.
(2) The text shown in Figure 17 will be displayed in terminal software.
Figure 17 Display of Selecting the Serial Device on the Terminal Software
The display shown in Figure 17 means the following.
URT Demo : USB-to-UART communication conversion
IIC Demo : USB-to-I2C communication conversion (Refer to Chapter 9 )
SSU Demo : USB-to-SSU communication conversion (Refer to Chapter 10)
3) Selecting the serial function
Do you select URT Demo ?
Do you select IIC Demo ?
Do you select SSU Demo ?
Select “UART”
USB-to-UART
communication
conversion function
Select “I2C”
Turn on Power
Confirm TP1
State
USB downloader
function
USB–to-Serial
communication
conversion function
TP1 = “GND” TP1 =“Open”
USB–to-I2C
communication
conversion function
Select “SSU”
USB–to-SSU
communication
conversion function