M16CSLASH29 datasheet(366/499 Pages) RENESAS

366 / 499 page

20. Flash Memory Version

page 342

Figure 20.7 FMR4 Register

Flash Memory Control Register 4

Symbol

Address

After Reset

FMR4

01B316

010000002

b7 b6 b5 b4 b3 b2 b1 b0

Bit Symbol

Bit Name

Function

Erase suspend

request bit (2)

0: Erase restart

1: Suspend request

FMR41

Reserved bit

Set to 0

Erase suspend function

enable bit (1)

0: Disabled

1: Enabled

Reserved bit

Set to 0

FMR40

(b5-b2)

(b7)

FMR46

Erase status

0: During auto-erase operation

1: Auto-erase stop

(erase suspend mode)

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).

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