CHAPTER 19
µ
PD78P0208
376
User’s Manual U11302EJ4V0UM
(4) Page data latch mode
Setting CE to H, PGM to H, and OE to L at the start of the page write mode sets the page data latch mode.
In this mode, 1-page 4-byte data is latched in the internal address/data latch circuit.
(5) Page write mode
After a 1-page 4-byte address and data are latched by the page data latch mode, a page write is executed
by applying a 0.1 ms program pulse (active-low) to the PGM pin while CE = H and OE = H. After this,
program verification can be performed by setting CE to L and OE to L.
If programming is not performed by one program pulse, repeated write and verify operations are executed
X times (X
≤
10).
(6) Byte write mode
A byte write is executed by applying a 0.1 ms program pulse (active-low) to the PGM pin while CE = L
and OE = H. After this, program verification can be performed by setting OE to L.
If programming is not performed by one program pulse, repeated write and verify operations are executed
X times (X
≤
10).
(7) Program verify mode
Setting CE to L, PGM to H, and OE to L sets the program verify mode.
After writing is performed, this mode should be used to check whether the data was written correctly.
(8) Program inhibit mode
The program inhibit mode is used when the OE, V
PP
, and D0 to D7 pins of multiple
µ
PD78P0208s are
connected in parallel, and when you wish to write to one of these devices.
The page write mode or byte write mode described above is used to perform a write. At this time, the
write is not performed on the device which has the PGM pin driven high.
Содержание mPD780204
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