M16C1N Datasheet, PDF(196/238 Page) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/10 SERIES

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M16C1N Datasheet, PDF (196/238 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/10 SERIES

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M16C/1N Group

19. Flash Memory Version

EW1 mode operation procedure

Program in ROM

Single-chip mode

Set CM0, CM1, and PM1 registers (Note 1)

Set the FMR01 bit by writing "0" and then "1" (CPU

rewrite mode enabled)

Set the FMR11 bit by writing "0" and then "1" (EW1

mode) (Note 2)

Execute software commands

Write "0" to the FMR01 bit

(CPU rewrite mode disabled)

Note 1: Select 10 MHz or less for CPU clock using the CM0 registerâs CM06 bit and CM1

registerâs CM17 to 6 bits. Also, set the PM1 registerâs PM17 bit to "1" (with wait

state).

Note 2: To set the FMR01 bit to "1", write "0" and then "1" in succession. Make sure no

interrupts will occur before writing "1" after writing "0".

Figure 19.7 Setting and resetting of EW1 mode

Rev.1.00 Oct 20, 2004 page 184 of 222

REJ09B0007-0100Z

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