M30222 Datasheet, PDF (228/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

dUevnedlo_S^epr_p^m_e^en_c^t_{ifications in this manual are tentative and subject to change}
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
Serial I/O Mode 2 (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) Page Read Command
This command reads the specified page (256 bytes) in the flash memory sequentially one byte at a time.
Execute the page read command as explained here following.
(1) Transfer the “FF16” 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, data (D0–D7) for the page (256 bytes) specified with addresses A8 to A23 will be
output sequentially from the smallest address first in sync with the rise of the clock.
RxD1
(M16C receive data)
TxD1
(M16C transmit data)
FF16
A8 to
A15
A16 to
A23
data0
data255
Figure 1.184. Timing for page read
(2) 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 the 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 is known by reading the status register. Each block can be write
protected with the lock bit. Additional writing is not allowed with the pages programmed already.
RxD1
(M16C receive data)
TxD1
(M16C transmit data)
4116
A8 to
A15
A16 to
A23
data0
data255
Figure 1.185. Timing for the page program
1-229