HD64F2357F20V Datasheet, PDF (640/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

FWE
t_pns
Address
t_ceh
CE
t_nxtc
OE
t_wep
WE
t_ces
t_f
t_r
I/O7
t_ds
t_dh
I/O6
Data
H'40
Address
stable
t_as
t_ah
Data transfer
1 byte to 128 bytes
Data
t_pnh
t_wsts
t_spa
t_{write (1 to 3000 ms)}
Programming operation
end identification signal
t_nxtc
Programming normal
end identification signal
Programming wait
Data
I/O0 to
I/O5 = 0
Figure 19-29 Auto-Program Mode Timing Waveforms
Notes on Use of Auto-Program Mode
• In auto-program mode, 128 bytes are programmed simultaneously. This should be carried out by executing 128
consecutive byte transfers.
• 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.
• 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.
• Memory address transfer is performed in the second cycle (figure 19-29). Do not perform memory address transfer
after the second cycle.
• Do not perform a command write during a programming operation.
• Perform one auto-programming operation for a 128-byte block for each address. Characteristics are not guaranteed for
two or more programming operations.
• Confirm normal end of auto-programming by checking I/O₆. Alternatively, status read mode can also be used for this
purpose (I/O₇ status polling uses the auto-program operation end identification pin).
• The status polling I/O₆ and I/O₇ pin information is retained until the next command write. Until the next command
write is performed, reading is possible by enabling CE and OE.
Rev.6.00 Oct.28.2004 page 610 of 1016
REJ09B0138-0600H