32186 datasheet(178/1032 Pages) RENESAS

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INTERNAL MEMORY

6-36

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.6 Programming Internal Flash Memory

END

Confirm the result of execution

of the programming process

(Note 1)

Last address?

YES

START

Write the program data (2 bytes x 4)

to the internal flash memory address

to be programmed

Write the 4 Halfword Program command

(H'4343) to any address of

the internal flash memory

Internal flash memory is programmed

by 4 Halfword Program

Wait for 1 µs

(using a hardware or software timer)

FBUSY bit = 1

TIME OUT?

1600 µs (Note 2)

YES

Forcibly terminated

YES

To next 4 halfword

Note 1: Check Flash Status Register (FSTAT) ERASE bit (for the erase status) and WRERR bit (for the write status).

Note 2: It is a timeout period for 4-Kbyte block. The timeout period for other than 4 Kbytes is 800 µs.

Figure 6.6.9 4 Halfword Program

(2) 4 Halfword Program command

This command performs write (programming) to the flash memory by 2 bytes(halfword) x every 4 times of 4

halfwords (8 bytes unit). And the initial address when writing is 4 halfwords boundary (the lower address

B'000).

To program the flash memory, write the Program command (H’4343) to any address of the internal flash

memory and then the program data to the address to be programmed.

The protected flash memory blocks cannot be accessed for write by the 4 Halfword Program command.

4 halfword programming is automatically performed by the internal control circuit, and whether the 4

Halfword Program command has finished can be known by checking the Flash Status Register (FSTAT)

FBUSY (Flash busy) bit. While the FBUSY bit = "0," the next programming cannot be performed.

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