M30222 Datasheet, PDF (234/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
Serial I/O Mode 2 (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(14) Boot ROM Area Output Command
This command outputs the control program stored in the boot ROM area in one page blocks (256 bytes). To
execute the boot ROM area output command:
(1) Transfer the “FC16” 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)
FC16
A8 to A16 to
A15
A23
data0
data255
Figure 1.198. Timing for Boot ROM area output
(15) Read CRC Data
This command reads the CRC data that confirms that the write data sent with the page program command
was successfully received.
(1) Transfer the "FD16" command code with the 1st byte.
(2) The CRC data (low) is received with the 2nd byte and the CRC data (high) with the 3rd byte.
To use this command, first execute the command and then initialize the check data. Next, execute the page
program command the required number of times. After the read CRC command is executed again, the CRC
data for all the read data that was sent with the page program command is read. The CRC data is the result
of CRC operation of write data.
RxD1
(M16C receive data)
TxD1
(M16C transmit data)
Figure 1.199. Timing for the read CRC data
FD16
CRC data (low) CRC data (high)
1-235