32182 datasheet(161/755 Pages) RENESAS

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6-26

INTERNAL MEMORY

32182 Group User’s Manual (Rev.1.0)

(5) Erase All Unlocked Blocks command

The Erase All Unlocked Blocks command erases all flash memory blocks that are not protected. To erase all

unlocked blocks, write the command (H’A7A7) to any address of the internal flash memory. Next, write the

Verify command (H’D0D0) to any address of the internal flash memory, and all unlocked memory blocks are

thereby erased.

6.5 Programming the Internal Flash Memory

END

Read any address of the internal flash

memory (Note 2) to check for erase

error (see Figure 6.4.2)

START

Write the Verify command (H'D0D0) to

any address of the internal flash memory

Write the Erase All Unlocked Blocks

command (H'A7A7) to any address of the

internal flash memory

Flash memory contents are erased

by Erase All Unlocked Blocks

(Note 1)

Wait for 1 µs

(using a hardware or software timer)

FSTAT bit = 1

TIME OUT?

10s

YES

Forcibly terminated

(see Figure 6.4.3.)

YES

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

to check for erase error.

Figure 6.5.11 Erase All Unlocked Blocks Command

32182 Datasheet(PDF) 161 Page - Renesas Technology Corp