Renesas rl78 User Manual

 

RL78/G1A 

CHAPTER  25   FLASH  MEMORY 

Communication modes of the RL78 microcontroller are as follows. 

 

Standard Setting

 

Communication 

Mode 

Port Speed

 

Frequency  

Multiply Rate 

Pins Used 

1-line UART 
(when flash 
memory 
programmer is 
used, or when 
external device 
is used) 

UART 115200 

bps, 

250000 bps, 
500000 bps, 
1 Mbps 

− 

− 

TOOL0 

Dedicated UART 
(when external 
device is used) 

UART 115200 

bps, 

250000 bps, 
500000 bps, 
1 Mbps 

− 

− 

TOOLTxD, 
TOOLRxD 

Notes 1.  Selection items for Standard settings on GUI of the flash memory programmer. 

 

2.  Because factors other than the baud rate error, such as the signal waveform slew, also affect UART 

communication, thoroughly evaluate the slew as well as the baud rate error. 

 

<R> 

The RL78 microcontroller executes serial programming through the commands listed in Table 25-7. 

The signals sent from the dedicated flash memory programmer or external device to the RL78 microcontroller are 

called commands, and programming functions corresponding to the commands are executed.  For details, refer to the 

RL78 Microcontrollers (RL78 Protocol A) Programmer Edition Application Note (R01AN0815). 

 

Classification Command 

Name 

Function 

Verify Verify 

Compares the contents of a specified area of the flash memory with 

data transmitted from the programmer. 

Erase 

Block Erase 

Erases a specified area in the flash memory. 

Blank check 

Block Blank Check 

Checks if a specified block in the flash memory has been correctly 

erased. 

Write 

Programming 

Writes data to a specified area in the flash memory. 

Silicon Signature 

Gets the RL78 microcontroller information (such as the part number, 

flash memory configuration, and programming firmware version). 

Getting information 

Checksum 

Gets the checksum data for a specified area. 

Security Set 

Sets security information. 

Security Get 

Gets security information. 

Security 

Security Release 

Release setting of prohibition of writing. 

Reset 

Used to detect synchronization status of communication. 

Others 

Baud Rate Set 

Sets baud rate when UART communication mode is selected.

 

<R> 

 

 

Note  Confirm that no data has been written to the write area.  Because data cannot be erased after block erase is 

prohibited, do not write data if the data has not been erased. 

 

 

R01UH0305EJ0200  Rev.2.00 

 

 

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Jul 04, 2013