M32CSLASH86 datasheet(425/505 Pages) RENESAS

425 / 505 page

Page 402

25. Flash Memory Version

)

(

Single-chip mode(1)

Set the MCD and PM1 registers(2)

Set the FMR01 bit to "1" (CPU rewrite mode

enabled) after writing "0"

Set the FMR11 bit to "1" (EW mode 1) after

writing "0"(3)

Program in the ROM

Procedure to Enter EW Mode 1

Execute the software commands

Set the FMR01 bit to "0"

(CPU rewrite mode disabled)(4)

NOTES:

1. In EW mode 1, do not enter memory expansion or boot mode.

2. In CPU rewrite mode, set the MCD register to be the 10-MHz CPU clock frequency or less. Set

the PM12 bit in the PM1 register to "1" (internal access wait).

3. To set the FMR01 bit to "1", set it to "1" in 8-bit unit immediately after setting it first to "0". Do not

generate an interrupt or a DMA transfer between setting the FMR01 bit to "0" and setting it to "1".

To set the FMR11 bit to "1", set it to "1" in 8-bit unit immediately after setting it first to "0". Do not

generate an interrupt or a DMA transfer between setting the FMR11 bit to "0" and setting it to "1".

Set the FMR01 and FMR11 bits while the NMI pin is held "H".

4. To change the FMR01 bit setting from "1" to "0", enter read array mode to write to addresses

005716 in 16-bit unit. Write "0016" into 8 high-order bits.

Figure 25.7 How to Enter and Exit EW Mode 1

M32C/86 Datasheet(PDF) 425 Page - Renesas Technology Corp