32182 datasheet(151/755 Pages) RENESAS

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6-16

INTERNAL MEMORY

32182 Group User’s Manual (Rev.1.0)

Figure 6.5.4 Procedure for Programming/Erasing the Internal Flash Memory (when the flash write/erase

program already exists in it)

(2) When the flash write/erase program already exists in the internal flash memory

In this case, the flash write/erase program prepared in the internal flash memory is used to program or erase

the internal flash memory.

For programming/erase operation here, use the internal peripheral circuits in the manner suitable for the

programming system. (All resources of the internal peripheral circuits such as the data bus, serial I/O and

ports can be used.)

The following shows an example for programming or erasing the internal flash memory by using serial I/O0 in

single-chip mode.

SIO0

CPU

Flash write/

erase

program

SIO0

CPU

Flash write/

erase

program

MOD1 = L

SIO0

CPU

RAM

Flash write/

erase

program

FP = L or H

Write data

RAM

• Initial state (Flash write/erase program existing in the internal flash memory)

• An ordinary program in the internal flash memory is being executed.

• Set the FP pin high, MOD1 pin low and MOD0 pin low to place the

flash memory in single-chip + flash E/W enable mode.

• After determining the FP pin and MOD1 pin levels, transfer the flash

write/erase program from the internal flash memory area into the RAM.

• Jump to the flash write/erase program in the RAM.

• Using the flash write/erase program in the RAM, set the Flash Control

• Program or erase the internal flash memory using the flash write/erase

program in the RAM.

• When finished, jump to the program in the flash memory or apply a

reset to enter normal mode.

M32R/ECU

External device

Flash

memory

Flash write

data

Flash

memory

MOD0 = L

MOD1 = L

FP = H

MOD0 = L

MOD1 = L

FP = H

MOD0 = L

Write data

6.5 Programming the Internal Flash Memory

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