Renesas M16C/62P Series Hardware Manual page 292

M16C/62P Group (M16C/62P, M16C/62PT)
Flash Memory Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
0
NOTES :
1. To set this bit to "1," w rite "0" and then "1" in succession. Make sure no interrupts or DMA transfers w ill occur
before w riting "1" after w riting "0".
Write to this bit w hen the NMI
than the flash memory.
Enter read array mode and set this bit to "0".
2. To set this bit to "1," w rite "0" and then "1" in succession w hen the FMR01 bit = 1. Make sure no interrupts or no
DMA transfers w ill occur before w riting "1" after w riting "0".
3. Write to this bit from a program in other than the flash memory.
4. This flag is cleared to "0" by executing the Clear Status command.
5. Effective w hen the FMR01 bit = 1 (CPU rew rite mode). If the FMR01 bit = 0, although the FMR03 bit can be set to "1"
by w riting "1" in a program, the flash memory is neither placed in low pow er mode nor initialized.
6. This status includes w riting or reading w ith the Lock Bit Program or Read Lock Bit Status command.
Figure 22.5 FMR0 Register
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
Symbol Address
01B7h
FMR0
Bit Symbol Bit Name
___
RY/BY Status Flag
FMR00
CPU Rew rite Mode Select
FMR01
(1)
Bit
Lock Bit Disable Select Bit
FMR02
Flash Memory Stop Bit
FMSTP
— Reserved Bit
(b4)
User ROM Area Select Bit
FMR05
(Effective in Only Boot Mode)
Program Status Flag
FMR06
Erase Status Flag
FMR07
____
pin is in the high state. Also, w hile in EW0 mode, w rite to this bit from a program in
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0 : Busy (being w ritten or erased)
1 : Ready
0 : Disables CPU rew rite mode
1 : Enables CPU rew rite mode
(2)
0 : Enables lock bit
1 : Disables lock bit
(3, 5)
0 : Enables flash memory operation
1 : Stops flash memory operation
(placed in low pow er mode, flash memory
initialized)
Set to "0"
(3)
0 : Boot ROM area is accessed
1 : User ROM area is accessed
(4)
0 : Terminated normally
1 : Terminated in error
(4)
0 : Terminated normally
1 : Terminated in error
22. Flash Memory Version
After Reset
00000001b
Function
010-62245566 13810019655
RW
RO
RW
RW
RW
RW
RW
RO
RO