M30222 Datasheet, PDF (213/237 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
(7) Read Lock Bit Status Command
This command reads the lock bit status of the specified block. Execute the lock bit program command 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. Write the highest address of the speci-
fied block for address A8 to A23.
CLK0
RxD0
(M16C receive data)
7116
A8 to A16 to
A15
A23
TxD0
(M16C transmit data)
RTS0(BUSY)
D016
Fig. 1.168. Timing for reading lock bit status
(8) Lock Bit Program Command
This command writes "0" (lock) for the lock bit of the specified block. Execute the lock bit program command
as explained here following.
(1) Transfer the "7716" command code with the 1st byte.
(2) Transfer addresses A8 to A15 and A16 to A23 with the 2nd and 3rd bytes.
(3) Transfer the verify command code "D016" with the 4th byte. With the verify command code, "0" is written for
the lock bit of the specified block. Write the highest address of the specified block for address A8 to A23.
When writing ends, RTS0 (BUSY) signal changes from the "H" to "L". Lock bit status can be read with the read
lock bit status command. For information on the lock bit function an reset procedure, see the Data Protection
Function section.
CLK1
RxD1
(M16C receive data)
TxD1
(M16C transmit data)
RTS1(BUSY)
7716
A8 to
A15
A16 to
A23
D016
Fig. 1.169. Timing for the lock bit program
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