Renesas Laptop 6NM 사용자 설명서

Rev.1.10    Jul 01, 2005    page 254 of 318
REJ09B0124-0110

M16C/6N Group (M16C/6NK, M16C/6NM)

20. Flash Memory Version

This document is under development and its contents are subject to change.

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 20.11 shows a flow chart of the read lock bit status command programming.

 

Start 

YES

NO

 

FMR00=1?

YES

NO

FMR16=0?

Write the command code "xx71h"

Write "xxD0h" to the highest-order
block address

Block is not locked

Block is locked

NOTE:

1. Write the command code and data to even addresses.