M16CSLASH62M datasheet(282/615 Pages) RENESAS

tên linh kiện	M16C/62M

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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

1-263

Lock Bit Enable Command

This command enables the lock bit in blocks whose bit was disabled with the lock bit disable com-

mand. The command code “7A16” is sent with the 1st byte of the serial transmission. This command

only enables the lock bit function; it does not set the lock bit itself.

Read Lock Bit Status Command

This command reads the lock bit status of the specified block. Execute the read lock bit status com-

mand as explained here following.

(1) Transfer the “7116” command code with the 1st byte.

(2) Transfer addresses A8 to A15 and A16 to A23 with the 2nd and 3rd bytes respectively.

(3) The lock bit data of the specified block is output with the 4th byte. The lock bit data is the 6th

bit(D6) of the output data. Write the highest address of the specified block for addresses A8 to

A23.

Figure 1.29.30. Timing for reading lock bit status

Figure 1.29.31. Timing for enabling the lock bit

RxD1

TxD1

A8 to

A15

A16 to

A23

7116

(M16C reception data)

(M16C transmit data)

7A16

RxD1

TxD1

(M16C reception data)

(M16C transmit data)

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