M16C62N Datasheet, PDF (203/213 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsubishi microcomputers
M16C / 62N Group (80-pin)
Appendix Standard Serial I/O Mode 2 (Flash Memory Version) ^{SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER}
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.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
7116
A8 to A16 to
A15
A23
D6
Figure 1.32.29. Timing for reading lock bit status
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.
RxD1
(M16C reception data)
TxD1
(M16C transmit data)
7A16
Figure 1.32.30. Timing for enabling the lock bit
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