UPD78P083GB-3BS-MTX-A Datasheet, PDF (22/58 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78P083
(1) Read mode
Read mode is set if CE = L, OE = L is set.
(2) Output disable mode
Data output becomes high-impedance, and is in the output disable mode, if OE = H is set.
Therefore, it allows data to be read from any device by controlling the OE pin, if multiple µPD78P083s are connected
to the data bus.
(3) Standby mode
Standby mode is set if CE = H is set.
In this mode, data outputs become high-impedance irrespective of the OE status.
(4) Page data latch mode
Page data latch mode is set if CE = H, PGM = H, OE = L are set at the beginning of page write mode.
In this mode, 1 page 4-byte data is latched in an internal address/data latch circuit.
(5) Page write mode
After 1 page 4 bytes of addresses and data are latched in the page data latch mode, a page write is executed by applying
a 0.1-ms program pulse (active low) to the PGM pin with CE = H, OE = H. Then, program verification can be performed,
if CE = L, OE = L are set.
If programming is not performed by a one-time program pulse, X times (X ≤ 10) write and verification operations should
be executed repeatedly.
(6) Byte write mode
Byte write is executed when a 0.1-ms program pulse (active low) is applied to the PGM pin with CE = L, OE = H. Then,
program verification can be performed if OE = L is set.
If programming is not performed by a one-time program pulse, X times (X ≤ 10) write and verification operations should
be executed repeatedly.
(7) Program verify mode
Program verify mode is set if CE = L, PGM = H, OE = L are set.
In this mode, check if a write operation is performed correctly after the write.
(8) Program inhibit mode
Program inhibit mode is used when the OE pin, VPP pin, and D0-D7 pins of multiple µPD78P083s are connected in
parallel and a write is performed to one of those devices.
When a write operation is performed, the page write mode or byte write mode described above is used. At this time,
a write is not performed to a device which has the PGM pin driven high.
20