Renesas ZTAT H8S/2357F, Руководство по оборудованию

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