H8SXSLASH1663 datasheet(999/1158 Pages) RENESAS

999 / 1158 page

Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 947 of 1102

REJ09B0294-0100

Transfer of the

programming

program

Host

Boot program

Programming selection (H'43, H'44)

ACK

Programming

128-byte programming (address, data)

ACK

128-byte programming (H'FFFFFFFF)

ACK

Repeat

Figure 21.24 Programming Sequence

• Erasure

Erasure is executed by the erasure selection and block erasure commands.

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 sequence for the erasure selection and block erasure commands is shown in figure 21.25.

Transfer of erasure

program

Host

Boot program

Preparation for erasure (H'48)

ACK

Erasure

Erasure (Erasure block number)

Erasure (H'FF)

ACK

Repeat

Figure 21.25 Erasure Sequence

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