M30620FCAFP datasheet(286/615 Pages) RENESAS

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Appendix Standard Serial I/O Mode 2 (Flash Memory Version)

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

1-267

Read Check Data

This command reads the check data that confirms that the write data, which was sent with the page

program command, was successfully received.

(1) Transfer the "FD16" command code with the 1st byte.

(2) The check data (low) is received with the 2nd byte and the check data (high) with the 3rd.

To use this read check data command, first execute the command and then initialize the check data.

Next, execute the page program command the required number of times. After that, when the read

check command is executed again, the check data for all of the read data that was sent with the page

program command during this time is read. The check data is the result of CRC operation of write

data.

Figure 1.29.38. Timing for the read check data

Check data (low)

RxD1

TxD1

FD16

(M16C reception data)

(M16C transmit data)

Check data (high)

Baud Rate 9600

This command changes baud rate to 9,600 bps. Execute it as follows.

(1) Transfer the "B016" command code with the 1st byte.

(2) After the "B016" check code is output with the 2nd byte, change the baud rate to 9,600 bps.

Figure 1.29.39. Timing of baud rate 9600

RxD1

TxD1

B016

(M16C reception data)

(M16C transmit data)

B016

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