SH7041A datasheet(771/923 Pages) RENESAS

771 / 923 page

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22.11.4

Auto-Program Mode

1. In auto-program mode, 128 bytes are programmed simultaneously. This should be carried out

by executing 128 consecutive byte transfers.

2. A 128-byte data transfer is necessary even when programming fewer than 128 bytes. In this

case, H'FF data must be written to the extra addresses.

3. The lower 8 bits of the transfer address must be H'00 or H'80. If a value other than an effective

address is input, processing will switch to a memory write operation but a write error will be

flagged.

4. Memory address transfer is performed in the second cycle (figure 22.24). Do not perform

transfer after the second cycle.

5. Do not perform a command write during a programming operation.

6. Perform one auto-program operation for a 128-byte block for each address. Characteristics are

not guaranteed for two or more additional programming operations.

7. Confirm normal end of auto-programming by checking I/O6. Alternatively, status read mode

can also be used for this purpose (I/O7 status output uses the auto-program operation end

identification pin).

8. Status polling I/O6 and I/O7 pin information is retained until the next command write. As long

as the next command write has not been performed, reading is possible by enabling

CE and

OE.

SH7041A Datasheet(PDF) 771 Page - Renesas Technology Corp