M30201_M Datasheet, PDF (164/415 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

Mitsubishi microcomputers
M30201 Group
Appendix Standard Serial I/O Mode 1 (Flash Memory Version) ^{SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER}
Erase All Unlocked Blocks Command
This command erases the content of all blocks. Execute the erase all unlocked blocks command as
explained here following.
(1) Transfer the “A716” command code with the 1st byte.
(2) Transfer the verify command code “D016” with the 2nd byte. With the verify command code, the
erase operation will start and continue for all blocks in the flash memory.
When block erasing ends, the P53 (BUSY) signal changes from the “H” to the “L” level. The result of the
erase operation can be known by reading the status register.
CLK0
RxD0
(M16C reception data)
TxD0
(M16C transmit data)
P53(BUSY)
A716 D016
Figure 1.111. Timing for erasing all unlocked blocks
Read Lock Bit Status Command
This command reads the lock bit status of the specified block. Execute the read lock bit status com-
mand as explained here following.
(1) Transfer the “7116” command code with the 1st byte.
(2) Transfer addresses A8 to A15 and A16 to A23 with the 2nd and 3rd bytes respectively.
(3) The lock bit data of the specified block is output with the 4th byte. Write the highest address of
the specified block for addresses A8 to A23.
The M30201 (flash memory version) does not have the lock bit, so the read value is always “1” (block
unlock).
CLK0
RxD0
(M16C reception data)
TxD0
(M16C transmit data)
P53(BUSY)
7116
A8 to A16 to
A15
A23
DQ6
Figure 1.112. Timing for reading lock bit status
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