M16C6K9 Datasheet, PDF (263/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
CPU Reprogram Mode
Flash memory control register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
FMR
Address
03B716
When reset
XX0000012
Bit symbol
Bit name
FMR0
FMR1
RY/BY signal status bit
CPU reprogram mode
select bit (Note 1)
Function
0: Busy (be written and erased)
1: Ready
0: Normal mode
1: CPU reprogram mode
RR WW
Reserved bit
Must be “0”.
FMR3
Flash memory reset bit 0: Normal operation
(Note 2)
1: Reset
Reserved bit
Must be “0”.
FMR5
User ROM area select bit
(Note 3)
0: Access to boot ROM area
(Only enabled in boot mode) ^{1: Access to user ROM area}
Nothing is assigned.
When write, set “0”. When read, value is indeterminate.
Note 1: To write “1” to the bit, it is necessary to write “0” and “1” in succession.
Otherwise the bit will not be “1”. Please do not enter interrupt and DMA.
Note 2: It is enabled only CPU reprogram mode select bit is “1”. After setting to
“1”(reset), please write “0” in succession.
Note 3: Please write this bit with program that is not located in on-chip flash
memory area.
Flash memory identification register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
FTR
Address
03B416
When reset
XXXXXX102
Function
The value after reset
XXXXXX102 : M16C/6K9 Group
000000002 : M16C/6K7 Group
XXXX00012 : M16C/6K5 Group (Note)
Note: Address 03B416 of M16C/6K5 Group is the flash memory control register.
RW
Fig.BB-1 The structure of flash memory control register and flash memory identification register
Rev.1.00 Jun 06, 2003 page 263 of 290