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RL78/G1A CHAPTER 25 FLASH MEMORY
25.4.3 Selecting communication mode
Communication modes of the RL78 microcontroller are as follows.
Table 25-6. Communication Modes
Standard Setting
Note 1
Communication
Mode
Port Speed
Note 2
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.
25.4.4 Communication commands
<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).
Table 25-7. Flash Memory Control Commands
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.2.00 812
Jul 04, 2013