Datasheet

ManualsBrandsRenesas ManualsComputer HardwareM16C/26A

PPLICATION NOT

REU05B0042-0100Z June 2003

Page 1 of 8

M16C/26

Programming Flash Memory via Flash-Over-USB™

1.0 Abstract

The following article describes using a synchronous serial port and the FoUSB (Flash-over-USB™) Programmer

application to program the user flash memory of the M16C/26 series of microcontrollers. This is referred to in the

M16C/26 datasheet as the “Standard Serial I/O Mode 1” method of flash programming.

2.0 Introduction

The Renesas M16C/26 is a 16-bit MCU based on the M16C/60 series CPU core. The peripheral set includes

10-bit A/D, UARTs, Timers, DMA, and GPIO. The MCU features include up to 64K bytes of Flash ROM, 2K bytes

of RAM, and 4K bytes of virtual EEPROM. The flash memory is divided into several blocks as shown in Figure 1,

and so, allows memory to be erased one block at a time.

Block B: 2KB

RESERVED

Block 3: 32KB

0F000H

0F800H

FFFFFH

Block A: 2KB

Block 2: 16KB

Block 1: 8KB

FE000H

FC000H

F8000H

F0000H

Part No.

M30262F3-GP

M30262F4-GP

M30262F6-GP

M30262F8-GP

Block 3 Size

0 KB

16KB

32KB

Start Address

N/A

F4000H

F0000H

Block 2 Size

8KB

16KB

Part No.

M30262F3-GP

M30262F4-GP

M30262F6-GP

M30262F8-GP

Start Address

FA000H

F8000H

8KB

User ROM Area Boot ROM Area

Figure 1 M16C/26 Flash Memory Map

The M16C/26 flash memory can be programmed with a single voltage. Three flash memory modes are available

in which to read, program and erase: (1) parallel I/O and (2) serial I/O modes in which the flash memory can be

manipulated using a programmer and (3) CPU rewrite mode in which the flash memory can be manipulated by

the Central Processing Unit (CPU). The Standard Serial I/O Mode can be further divided into a synchronous

mode (Standard Serial I/O Mode 1) and an asynchronous mode (Standard Serial I/O Mode 2). The standard

serial I/O mode inputs and outputs the software commands, addresses and data needed to operate (read,

program, erase, etc.) the internal flash memory using the serial I/O port UART1.

The flash memory is divided into two major blocks, a user program area and a boot ROM area. The user program

area is used for user application program and data. The boot ROM area has a control program stored in it when

shipped from the factory and can only be accessed when a special hardware reset sequence is initiated. This

Summary of content (9 pages)

PAGE 1
APPLICATION NOTE M16C/26 Programming Flash Memory via Flash-Over-USB™ 1.0 Abstract The following article describes using a synchronous serial port and the FoUSB (Flash-over-USB™) Programmer application to program the user flash memory of the M16C/26 series of microcontrollers. This is referred to in the M16C/26 datasheet as the “Standard Serial I/O Mode 1” method of flash programming. 2.0 Introduction The Renesas M16C/26 is a 16-bit MCU based on the M16C/60 series CPU core.
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M16C/26 Programming Flash Memory via Flash-Over-USB™ program allows asynchronous or synchronous serial programming of the user area of the flash and can only be changed by using Parallel I/O Mode. Renesas provides a Windows based program, Flash-Over-USB™ (FoUSB), to download code to M16C/26 MCUs. FoUSB Programmer is used along with the USB-Monitor (see Figure 3) for reprogramming the flash memory of a M16C/26 microcontroller over USB (Universal Serial Bus).
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M16C/26 Programming Flash Memory via Flash-Over-USB™ TxD1 pin is for CMOS output from the MCU. The RTS1 (BUSY) pin outputs a low level when ready for data reception and a high level when reception starts. Since the USB-Monitor uses the Renesas factory boot code to communicate with the target MCU, the proper pin connections should be considered on your target board design. An example connection for the M16C/26 is shown in Figure 4.
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M16C/26 Programming Flash Memory via Flash-Over-USB™ 4.1 Starting FoUSB Connect a USB-Monitor to the M16C/26 target board and then connect the USB cable to the PC as shown in Figure 4. To start FoUSB, double-click on 'fousb' icon on your desktop or select Flash-over-USB from the Start menu (Start > Programs > Renesas-Tools > Flash-over-USB ver. 1.xx > Flash-over-USB). A connection dialog box will appear as shown in Figure 5. Click OK and the main GUI of the FoUSB program will appear as shown in Figure 6.
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M16C/26 Programming Flash Memory via Flash-Over-USB™ 4.2 Selecting Target MCU To select the firefly as target MCU, perform the following steps. 1. Click on Select MCU on the FoUSB main GUI. A Chip Selection GUI appears as shown in Figure 7. 2. Click on M16C/26 from the Select MCU Family option. M30262F8_DBC appears as a part number in the Select MCU Part Number option. 3. Click on M30262F8_DBC under Select MCU Part Number to highlight it. Then press OK.
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M16C/26 Programming Flash Memory via Flash-Over-USB™ Figure 8 Dialog box for file selection Figure 9 FoUSB main GUI after file selection 4.4 Loading Target Program To load the selected target program into the MCU flash, perform the following steps: 1. Click on PROGRAM on FoUSB main GUI. The Program Flash dialog box appears as shown in Figure 10. 2. Select Erase->Program->Verify option (the default option) from Choose an Operation. 3. Select Erase All Block option from Erasing Options.
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M16C/26 Programming Flash Memory via Flash-Over-USB™ 4. Click on Program of the Program Flash GUI. The loading of target program into MCU flash will start at this point and the progress of flash programming will be shown dynamically by a moving bar located at the lower part of this dialog box. After a successful programming of the flash, a Program Completed Successfully dialog box will appear as shown in Figure 11. 5. Click on OK button and the dialog box disappear (nd back to the FoUSB main GUI).
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M16C/26 Programming Flash Memory via Flash-Over-USB™ 4.5 Exiting FoUSB Programmer To exit from FoUSB, click on EXIT or the X button on the upper right corner of the main GUI. 5.0 Reference Renesas Technology Corporation Semiconductor Home Page http://www.renesas.com E-mail Support support_apl@renesas.com Data Sheets • M16C/26 datasheet, M30262eds.pdf User’s Manual • MSV30262-SKP Users Manual, Users_Manual_MSV30262.pdf • MSV30262-SKP Quick start guide, Quick_Start_guide_MSV30262.
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Keep safety first in your circuit designs! • Renesas Technology Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage.