R8CSLASH20 datasheet(405/501 Pages) RENESAS

405 / 501 page

R8C/20 Group, R8C/21 Group

19. Flash Memory

Rev.2.00 Aug 27, 2008

Page 389 of 458

REJ09B0250-0200

Figure 19.8 shows the Timing of Suspend Operation.

Figure 19.8

Timing of Suspend Operation

Erase

starts

Erase

suspends

FMR00 bit in

FMR0 register

Program

starts

Program

suspends

Program

restarts

Program

ends

During erase

During program

Erase

restarts

Erase

ends

During erase

FMR46 bit in

FMR4 register

FMR44 bit in

FMR4 register

FMR43 bit in

FMR4 register

Check that the

FMR43 bit is set to 1

(during erase

execution), and that

the erase operation

has not ended.

Check that the

FMR44 bit is set to 1

(during program

execution), and that

the program has not

ended.

Check the status,

and that the

program ends

normally.

Check the status,

and that the erase

operation ends

normally.

Remains 0 during suspend

Remains 1 during suspend

The above figure shows an example of the use of program-suspend during programming following erase-suspend.

NOTE:

1. If program-suspend is entered during erase-suspend, always restart programming.

R8C/20 Datasheet(PDF) 405 Page - Renesas Technology Corp

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