32182 datasheet(149/755 Pages) RENESAS

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6-14

INTERNAL MEMORY

32182 Group User’s Manual (Rev.1.0)

Figure 6.5.2 Procedure for Programming/Erasing the Internal Flash Memory (when the flash write/erase

program does not exist in it)

(1) When the flash write/erase program does not exist in the internal flash memory

In this case, the boot program is used to program or erase the internal flash memory. To transfer the write

data, use serial I/O1 in clock-synchronized serial mode.

To program or erase the internal flash memory using a flash programmer, follow the procedure described below.

SIO1

CPU

SIO1

CPU

Flash write/

erase

program

MOD1 = L

SIO1

CPU

RAM

Flash

memory

FP = L or H

RAM

• Initial state (Flash write/erase program nonexistent in the internal

flash memory)

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

flash memory in boot mode + flash E/W enable mode.

• Dessert reset signal and start up with the boot program.

• Transfer the flash write/erase program 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.

• When finished, reset MOD0 low and jump to the internal flash memory

or apply a reset to enter normal mode.

M32R/ECU

External device (e.g., flash programmer)

Flash

memory

Flash write

data

Flash

memory

MOD0 = L

Boot

program

Boot

program

Boot

program

MOD1 = L

FP = H

MOD0 = H

MOD1 = L

FP = H

MOD0 = H

RESET = L

RESET = H

Flash write/

erase

program

Write data

External device (e.g., flash programmer)

6.5 Programming the Internal Flash Memory

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