r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1115

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

(10) Erasure
Erasure is performed with the erasure selection and block erasure command.
Firstly, erasure is selected by the erasure selection command and the boot program then erases the
specified block. The command should be repeatedly executed if two or more blocks are to be
erased. Sending a block-erasure command from the host with the block number H'FF will stop the
erasure operating. On completion of erasing, the boot program will wait for selection of
programming or erasing.
The sequences of the issuing of erasure selection commands and the erasure of data are shown in
figure 21.13.
Repeat
Host
Figure 21.13 Erasure Sequence
Preparation for erasure (H'48)
Erasure (Erasure block number)
Erasure (H'FF)
ACK
ACK
ACK
Rev. 1.00 Sep. 19, 2008 Page 1087 of 1270
Transfer of erasure
Boot program
Section 21 Flash Memory
Erasure
program
REJ09B0466-0100