M16C62P_06 Datasheet, PDF (305/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
22. Flash Memory Version
22.3.5.8 Read Lock Bit Status Command (71h)
The read lock bit status command reads the lock bit state of a specified block.
By writing “xx71h” in the first bus cycle and “xxD0h” to the highest-order even address of a block in the
second bus cycle, the FMR16 bit in the FMR1 register stores information on whether or not the lock bit of a
specified block is locked. Read the FMR16 bit after the FMR00 bit in the FMR0 register is set to “1” (ready).
Figure 22.13 shows a Flow Chart of the Read Lock Bit Status Command Programming.
Start
Write the command code “xx71h”
Write “xxD0h” to the highest-order
block address
NO
FMR00=1?
YES
NO
FMR16=0?
YES
Block is locked
Block is not locked
NOTES:
1. Write the command code and data to even addresses.
Figure 22.13 Read Lock Bit Status Command
Rev.2.41 Jan 10, 2006 Page 290 of 390
REJ09B0185-0241