R8CSLASH15 datasheet(215/277 Pages) RENESAS

215 / 277 page

R8C/14 Group, R8C/15 Group

18. Flash Memory Version

Rev.2.10

Jan 19, 2006

Page 203 of 253

REJ09B0164-0210

Figure 18.8 shows the How to Set and Exit EW0 Mode. Figure 18.9 shows the How to Set and Exit

EW1 Mode.

Figure 18.8

How to Set and Exit EW0 Mode

Figure 18.9

How to Set and Exit EW1 Mode

Set CM0 and CM1 registers(1)

Transfer a rewrite control program which uses CPU

rewrite mode to any areas other than the flash

memory

Jump to the rewrite control program which has been

transferred to any areas other than the flash memory

(The subsequent process is executed by the rewrite

control program in any areas other than the flash

memory)

Set the FMR01 bit by writing “0” and then “1”

(CPU rewrite mode enabled)(2)

Execute the read array command(3)

Execute software commands

Write “0” to the FMR01 bit

(CPU rewrite mode disabled)

Jump to a specified address in the flash memory

Rewrite Control Program

NOTES :

1. Select 5MHz or below for the CPU clock by the CM06 bit in the CM0 register and the CM16 to CM17 bits in the CM1 register.

2. When setting the FMR01 bit to “1”, write “0” to the FMR01 bit before writing “1”. Do not generate an interrupt between writing “0” and

“1”.

3. Disable the CPU rewrite mode after executing the read array command.

EW0 Mode Operating Procedure

Write “0” to the FMR01 bit before writing “1”

(CPU rewrite mode enabled)(1)

Write “0” to the FMR11 bit before writing “1”

(EW1 mode)

Execute Software Commands

Write “0” to the FMR01 bit

(CPU rewrite mode disabled)

NOTES :

1. When setting the FMR01 bit to “1”, write “0” to the FMR01 bit before writing “1”.

Do not generate an interrupt between writing “0” and “1”.

EW1 Mode Operating Procedure

Program in ROM

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