Renesas RL78/G10

RL78/G10 CHAPTER 20 FLASH MEMORY
R01UH0384EJ0311 Rev. 3.11 557
Dec 22, 2016
20.4.3 Communication mode
Communication mode of the RL78 microcontroller is as follows.
Table 20-4. Communication Mode
Communication
Mode
Standard Setting
Note 1
Pin Used
Port Speed
Note 2
Frequency Multiply Rate
1-line mode UART 115200 bps
− −
TOOL0
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.
20.4.4 Communication commands
The RL78 microcontroller performs serial programming by using commands described in Table 20-5.
The signals sent from the flash memory programmer or external device to the RL78 microcontroller are called
commands, and the RL78 microcontroller performs processing corresponding to the respective commands.
Table 20-5. Flash Memory Control Commands
Classification Command Name Function
CRC check CRC check Calculate checksums
Write after erase Write after erase Write data after erasing data in the flash memory
20.5 Processing Time of Each Command When Using PG-FP5 (Reference Values)
The processing time of each command (reference values) when using PG-FP5 as the dedicated flash memory
programmer is shown below.
Table 20-6. Processing Time of Each Command When Using PG-FP5 (Reference Values)
Command of PG-FP5 Code Flash
1 KB 2 KB 4 KB
R5F10Y14
R5F10Y44
R5F10Y16
R5F10Y46
R5F10Y17
R5F10Y47
Write after erase 1.0 s 1.0 s 1.3 s
CRC check 0.5 s 0.5 s 0.5 s
Remark The command processing times (reference values) shown in the table are typical values under the following
conditions.
Port: TOOL0 (single-line UART)
Speed: 115,200 bps