Renesas H8S/2319 series Hardware Manual page 781

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 17-87.
Repeat
(1) Erasure Selection
The boot program will transfer the erasure program. User MAT data is erased by the transferred
erasure program.
Command H'48
• Command, H'48, (1 byte): Erasure selection
Response H'06
• Response, H'06, (1 byte): Response for erasure selection
After the erasure program has been transferred, the boot program will return ACK.
Host
Preparation for Erasure (H'48)
Erasure (Erased Block Number)
Figure 17-87 Erasure Sequence
ACK
ACK
Erasure (H'FF)
ACK
Rev. 5.00, 12/03, page 751 of 1088
Boot Program
Transfer of Erasure
Program
Erasure