M306H7MG-XXXFP Datasheet, PDF (297/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
17. FLASH MEMORY VERSION
Read Lock Bit Status Command
This command reads the lock bit status of a specified block.
Write ‘exx7116’ in the first bus cycle and write ‘exxD016’ to the uppermost address of a block (even address,
however) in the second bus cycle, and the lock bit status of the specified block is stored in the FMR1 register’s
FMR16 bit. Read the FMR16 bit after the FMR0 register’s FMR00 bit is set to “1” (ready).
Figure 17.11 shows an example of a read lock bit status flowchart.
Start
Write the command code ‘xx7116’
Write ‘xxD016’ to the uppermost
block address
NO
FMR00=1?
YES
NO
FMR16=0?
YES
Locked
Not locked
Note: Write the command code and data at even number.
Figure 17.11 Read Lock Bit Status Command
Rev.2.10 Oct 25, 2006 Page 297 of 326
REJ03B0152-0210