h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 744

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 20 ROM
20.11.4 Auto-Program Mode
1. In auto-program mode, 128 bytes are programmed simultaneously. This should be carried out
2. A 128-byte data transfer is necessary even when programming fewer than 128 bytes. In this
3. The lower 7 bits of the transfer address must be low. If a value other than an effective address
4. Memory address transfer is performed in the second cycle (figure 20.22). Do not perform
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. Two or more
7. Confirm normal end of auto-programming by checking I/O6. Alternatively, status read mode
8. Status polling I/O6 and I/O7 pin information is retained until the next command write. As long
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REJ09B0257-0500
by executing 128 consecutive byte transfers.
case, H'FF data must be written to the extra addresses.
is input, processing will switch to a memory write operation but a write error will be flagged.
transfer after the third cycle.
additional programming operations cannot be performed on a previously programmed address
block.
can also be used for this purpose (I/O7 status polling uses the auto-program operation end
decision pin).
as the next command write has not been performed, reading is possible by enabling CE and
OE.