Renesas M16C/29 Series Hardware Manual page 397

M16C/29 Group
Flash memory control register 4
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0
Note 1: When setting this bit to "1", set to "1" immediately after setting it first to "0". Do not generate an
interrupt or a DMA transfer between setting the bit to "0" and setting it to "1". Set by a program in a
space other than the flash memory in EW0 mode.
Note 2: This bit is valid only when the erase-suspend enable bit (FMR40) is "1". Writing is enabled only
between executing an erase command and completing erase (this bit is set to "1" other than the
above duration). This bit can be set to "0" or "1" by a program in EW0 mode. In EW1 mode, this bit
is automatically set to "1" when the FMR40 bit is "1" and a maskable interrupt is generated during
erasing. Do not write to "1" by a program (writing "0" is enabled).
Figure 21.5.2. Flash memory control register 4
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
Symbol
FMR4
0 0
Bit symbol
Erase suspend function
FMR40
enable bit (Note 1)
FMR41
Erase suspend
request bit (Note 2)
Reserved bit
(b5-b2)
Erase status
FMR46
Reserved bit
(b7)
page 377 of 402
Address After reset
01B3 01000000
16 2
Bit name
0: Disabled
1: Enabled
0: Erase restart
1: Suspend request
Set to "0"
0: During auto-erase operation
1: Auto-erase stop
(erase suspend mode)
Set to "0"
21. Flash Memory Version
Function
RW
RW
RW
RO
RO
RW