M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 265

• Manufacturer Part Number: M30622SAFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Appendix Standard Serial I/O Mode 2 (Flash Memory Version)
Figure 1.29.32. Timing for disabling the lock bit
Figure 1.29.33. Timing for download
Lock Bit Disable Command
Download Command
This command disables the lock bit. The command code “75
transmission. This command only disables the lock bit function; it does not set the lock bit itself.
However, if an erase command is executed after executing the lock bit disable command, “0” (locked)
lock bit data is set to “1” (unlocked) after the erase operation ends. In any case, after the reset is
cancelled, the lock bit is enabled.
This command downloads a program to the RAM for execution. Execute the download command as
explained here following.
When all data has been transmitted, if the check sum matches, the downloaded program is executed.
The size of the program will vary according to the internal RAM.
(1) Transfer the “FA
(2) Transfer the program size with the 2nd and 3rd bytes.
(3) Transfer the check sum with the 4th byte. The check sum is added to all data sent with the 5th
(4) The program to execute is sent with the 5th byte onward.
(M16C reception data)
(M16C transmit data)
byte onward.
RxD1
TxD1
16
” command code with the 1st byte.
(M16C reception data)
(M16C transmit data)
FA
Data size (low)
16
RxD1
TxD1
Data size (high)
75
16
16
Check
sum
” is sent with the 1st byte of the serial
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Program
data
Program
data
M16C / 62A Group
Mitsubishi microcomputers
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