Renesas H8S Series Hardware Manual page 638

FWE
t
pns
Address
CE
OE
WE
I/O
7
I/O
6
Data
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/O
purpose (I/O status polling uses the auto-program operation end identification pin).
7
• The status polling I/O
write is performed, reading is possible by enabling CE and OE.
Rev.6.00 Oct.28.2004 page 610 of 1016
REJ09B0138-0600H
Address
t
t
ceh
as
t
nxtc
t
wep
t
ces
t
t
r
f
t
ds
t
dh
H'40
Figure 19-29 Auto-Program Mode Timing Waveforms
and I/O pin information is retained until the next command write. Until the next command
6 7
stable
t
ah
Data transfer
1 byte to 128 bytes
Data
. Alternatively, status read mode can also be used for this
6
t
pnh
t
t
wsts
spa
t
(1 to 3000 ms)
write
Programming operation
end identification signal
Programming normal
end identification signal
Programming wait
I/O to
0
Data
I/O = 0
5
t
nxtc