Background Information
FR Family MB91460 Series, Flash Programming, Doc. No. 002-05153 Rev. *A
10
Table 2-2. Internal bootloader functions
Command
PC to MCU
MCU to PC
Remark
READ
1 (0x01)
2 (0x02)
Address (4 bytes)
Size (2 bytes)
241 (0xF1)
130 (0x82)
Binary Dump
CheckSum (2 bytes)
Lo, MidLo, MidHi, Hi
Lo, Hi
Direct read and dump
Bootloader sends 16bit checksum
WRITE
1 (0x01)
3 (0x03)
Address (4 bytes)
Size (2 bytes)
Binary Dump
241 (0xF1)
131 (0x83)
CheckSum (2 bytes)
Lo, MidLo, MidHi, Hi
Lo, Hi
Receive and store dump in RAM
Bootloader sends 16bit checksum
CALL
1 (0x01)
4 (0x04)
Address (4 bytes)
241 (0xF1)
132 (0x84)
Return Parameter
Lo, MidLo, MidHi, Hi
Calls specified Address and waits for a
return
The returned parameter in R4 will be
echoed to the PC
CHECKSUM
1 (0x01)
5 (0x05)
241 (0xF1)
133 (0x85)
CheckSum (2 bytes)
MCU re-dumps 16bit checksum (Lo, Hi)
calculated at last write or read operation
BAUDRATE
1 (0x01)
6 (0x06)
Baudrate (4 bytes)
241 (0xF1)
134 (0x86)
Lo, MidLo, MidHi, Hi
Initializes UART with new baudrate
value
