M30222 Datasheet, PDF (214/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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Specifications in this manual are tentative and subject to change
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
Serial I/O Mode 1 (Flash Memory Version)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(9) Lock Bit Enable Command
This command enables the lock bit in blocks whose bit was disabled with the lock bit disable command. 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.
CLK0
RxD0
(M16C receive data)
TxD0
(M16C transmit data)
RTS0(BUSY)
Fig. 1.170. Timing for enabling the lock bit
7A16
(10) Lock Bit Disable Command
This command disables the lock bit. The command code "7516" is sent with the 1st byte of the serial transmis-
sion. This command only disables the lock bit function; It does not set the lock bit itself. However, if an erase
command is executed after executing the lock bit disable command, "0" (locked) lock bit data is set to "1"
(unlocked) after the erase operation ends. In any case, after the reset is cancelled, the lock bit is enabled.
CLK0
RxD0
(M16C receive data)
TxD0
(M16C transmit data)
RTS0(BUSY)
Fig. 1.171. Timing for disabling the lock bit
7516
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