UPD78P4038Y 查看數據表（PDF） - NEC => Renesas Technology

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UPD78P4038Y

16/8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD78P4038Y

6. PROM PROGRAMMING

The µPD78P4038Y has an on-chip 128-KB PROM device for use as program memory. When programming, set

the VPP and RESET pins for PROM programming mode. See (2) in Chapter 2 with regard to handling of other, unused

pins.

6.1 Operation Mode

PROM programming mode is selected when +5 V or +12.5 V is added to the VPP pin or low-level input is added

to the RESET pin. This mode can be set to operation mode by setting the CE pin, OE pin, and PGM pin as shown

in Table 6-1 below.

In addition, the PROM contents can be read by setting read mode.

Table 6-1. PROM Programming Operation Mode

Pin RESET

VPP

Operation Mode

VDD

CE

Page data latch

L

+12.5 V

+6.5 V

H

Page write

H

Byte write

L

Program verify

L

Program inhibit

×

×

Read

+5 V

+5 V

L

Output disable

L

Standby

H

OE

PGM

D0-D7

L

H

Data input

H

L

High impedance

H

L

Data input

L

H

Data output

H

H

High impedance

L

L

L

H

Data output

H

×

High impedance

×

×

High impedance

Remark × = L or H

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