UPD78P324(A) 查看數據表（PDF） - NEC => Renesas Technology

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UPD78P324(A)

16-/8-Bit Single-Chip Microcomputers

NEC => Renesas Technology 

µPD78P324, 78P324(A)

Function

Address input

Data input

Program pulse

Chip enable

Output enable

Program voltage

Mode voltage

Table 3-1. Pin Functions in Programming Mode

Normal Operation Mode

P00-P07, P80, P20, P81-P85, P33, P34

P40-P47

P32

P31

P30

VPP

RESET, AVDD

Programming Mode

A0-A16

D0-D07

PGM

CE

OE

3.1 OPERATION MODE

When placing the microcomputer in programming Write/Verify mode, set it to RESET = H and AVDD = L.

In this mode, an operation mode in Table 3-2 can be selected by further setting the CE and OE pins.

When reading the content of the PROM, set it to Read mode. Process the unused pins in accordance with

the instructions in the PIN CONFIGURATION.

Table 3-2. Operation Mode of PROM Programming

Mode

RESET

AVDD

CE

Program Write

L

Program verify

L

Program inhibit

X

H

L

X

Read

L

Output disable

L

Standby

H

OE

PGM

VPP

VDD

D0-D7

H

L

Data input

L

H

Data output

+12.5 V +6.5 V

L

L

H

H

High impedance

L

H

Data output

H

X

+5 V

+5 V High impedance

X

X

High impedance

Remark x: L or H

18

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