M16C62A Datasheet, PDF (209/242 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsubishi microcomputers
M16C / 62A Group (80-pin)
Appendix Standard Serial I/O Mode 1 (Flash Memory Version) ^{SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER}
Clear Status Register Command
This command clears the bits (SR3–SR5) which are set when the status register operation ends in
error. When the “5016” command code is sent with the 1st byte, the aforementioned bits are cleared.
When the clear status register operation ends, the RTS1 (BUSY) signal changes from the “H” to the
“L” level.
CLK1
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
RTS1(BUSY)
5016
Figure 1.25.4. Timing for clearing the status register
Page Program Command
This command writes the specified page (256 bytes) in the flash memory sequentially one byte at a
time. Execute the page program command as explained here following.
(1) Transfer the “4116” command code with the 1st byte.
(2) Transfer addresses A8 to A15 and A16 to A23 with the 2nd and 3rd bytes respectively.
(3) From the 4th byte onward, as write data (D0–D7) for the page (256 bytes) specified with addresses
A8 to A23 is input sequentially from the smallest address first, that page is automatically written.
When reception setup for the next 256 bytes ends, the RTS1 (BUSY) signal changes from the “H” to
the “L” level. The result of the page program can be known by reading the status register. For more
information, see the section on the status register.
Each block can be write-protected with the lock bit. For more information, see the section on the data
protection function. Additional writing is not allowed with already programmed pages.
CLK1
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
RTS1(BUSY)
4116
A8 to
A15
A16 to
A23
data0
data255
Figure 1.25.5. Timing for the page program
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