M16C26A Datasheet, PDF (259/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
17. Flash Memory Version
Flash Memory Control Register 4
b7 b6 b5 b4 b3 b2 b1 b0
0 0000
Symbol
FMR4
Address
01B316
After Reset
01000000 2
Bit Symbol
Bit Name
FMR40
FMR41
Erase suspend function
enable bit ⁽¹⁾
Erase suspend
request bit ⁽²⁾
(b5-b2) ^{Reserved bit}
FMR46 Erase status
Function
RW
0: Disabled
RW
1: Enabled
0: Erase restart
1: Suspend request
RW
Set to 0
RO
0: During auto-erase operation
1: Auto-erase stop
RO
(erase suspend mode)
(b7)
Reserved bit
Set to 0
RW
NOTES:
1. Set the FMR40 bit to 1 immediately after setting it first to 0. Do not generate any interrupt or DMA
transfer between setting the bit to 0 and setting it to 1. Set by program in space other than the flash
memory in EW mode 0.
2. The FMR41 bit is valid only when the FMR40 bit is set to 1. The FMR41 bit can be written only
between executing an erase command and completing erase (this bit is set to 0 other than the
above duration). The FMR41 bit can be set to 0 or 1 by program in EW mode 0. In EW mode 1, the
FMR41 bit is automatically set to 1 when the FMR40 bit is 1 and a maskable interrupt is generated
during erasing. The FMR41 bit cannot be set to 1 by program (it can be set to 0 by program).
Figure 17.5.2. FMR4 register
Rev. 2.00 Feb.15, 2007 page 242 of 329
REJ09B0202-0200