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A
to A
18
0
CE
OE
WE
VIH
I/O
to I/O
7
0
Figure 17-55 Timing Waveforms for CE
17.20.5 Auto-Program Mode
• In auto-program mode, 128 bytes are programmed simultaneously. For this purpose, 128
consecutive byte data transfers should be performed.
• A 128-byte data transfer must be performed even if writing fewer than 128 bytes; in this case,
H'FF data must be written to the extra addresses.
• The lower 7 bits of the transfer address must be held low. If an invalid address is input,
memory programming will be started but a programming error will occur.
• Memory address transfer is executed in the second cycle (figure 17-56). Do not perform
transfer later than 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. One or more
additional programming operations cannot be carried out on address blocks that have already
been programmed.
• Confirm normal end of auto-programming by checking I/O
can also be used for this purpose (the I/O
auto-program operation).
• Status polling I/O
the next command write has not been performed, reading is possible by enabling CE and OE.
Rev. 5.00, 12/03, page 656 of 1088
Address stable
t
ce
t
oe
t
acc
and I/O
information is retained until the next command write. As long as
6
7
Address stable
t
acc
t
t
df
oh
CE/OE
CE
CE
OE
OE Clocked Read
OE
. Alternatively, status read mode
6
status polling pin is used to identify the end of an
7
t
ce
t
oe
t
df
t
oh
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