M16C26 Datasheet, PDF (217/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
Appendix Standard Serial I/O Mode 1 (Flash Memory Version)
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Block Erase Command
This command erases the data in the specified block. Execute the block erase command as explained
here following.
(1) Transfer the “2016” command code with the 1st byte.
(2) Transfer addresses A8 to A15 and A16 to A23 with the 2nd and 3rd bytes respectively.
(3) Transfer the verifycommand code “D016” with the 4th byte. With the verify command code, the
erase operation will start for the specified block in the flash memory. Write the highest address of
the specified block for addresses A8 to A23.
When block erasing ends, the RTS1 (BUSY) signal changes from the “H” to the “L” level. After block
erase ends, the result of the block erase operation can be known by reading the status register. For
more information, see the section on the status register.
Each block can be erase-protected with the lock bit. For more information, see the section on the data
protection function.
CLK1
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
RTS1(BUSY)
2016
A8 to A16 to
A15
A23
D016
Figure 1.22.6. Timing for block erasing
Erase All Code Blocks Command
This command erases the content of all code blocks. Execute the erase all code 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 code blocks in the flash memory.
When block erasing ends, the RTS1 (BUSY) signal changes from the “H” to the “L” level. The result of
the erase operation can be known by reading the status register.
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