32182 datasheet(157/755 Pages) RENESAS

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6-22

INTERNAL MEMORY

32182 Group User’s Manual (Rev.1.0)

6.5 Programming the Internal Flash Memory

END

Read any address of the internal flash

memory (Note 3) to check for programming

error (see Figure 6.4.2)

Last address?

YES

START

Write the program data to the internal flash

memory address to be programmed (Note 1)

Write the next program data to the

previously programmed address + 2

Write the Page Program command

(H'4141) to any address of

the internal flash memory

Internal flash memory is programmed

by Page Program (Note 2)

Finished programming

one page?

YES

Wait for 1 µs

(using a hardware or software timer)

FSTAT bit = 1

TIME OUT?

0.5s

YES

Forcibly terminated

(see Figure 6.4.3.)

YES

To next page

Note 1: Start programming from the beginning of a 256-byte boundary (lower address H'00).

Note 2: When a programming operation started, the internal flash memory is automatically readied to run the Read Status command,

so that there is no need to enter the Read Status command until another command is entered.

Note 3: Inspect the Flash Status Register 2 ERASE (erase status), WRERR1 (write status 1) and WRERR2 (write status 2) bits to check

for programming error.

Figure 6.5.8 Page Program Command

(2) Page Program command

The internal flash memory is programmed one page at a time, each page consisting of 256 bytes (lower

addresses H’00 to H’FF). To program the flash memory, write the Page Program command (H’4141) 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 Page Program command.

Page programming is automatically performed by the internal control circuit, and whether the Page Program

command has finished can be known by checking the Flash Status Register 1 (FSTAT1) FSTAT bit. (See

Section 6.4.2, “Flash Status Registers.”) While the FSTAT bit = "0" (busy), the next programming (by the

Page Program command) cannot be performed.

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