UPD78P328CW データシートの表示（PDF） - NEC => Renesas Technology

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UPD78P328CW

16/8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD78P328

3. PROM PROGRAMMING

The PROM incorporated in the µPD78P328 is a 16,384 x 8-bit electrically writable PROM. For programming,

set the PROM programming mode by using the RESET and AVDD pins.

The programming characteristics are compatible with the µPD27C256A programming characteristics.

Table 3-1. Pin Function in Programming Mode

Function

Address input

Data input

Chip enable/program pulse

Output enable

Program voltage

Mode control

Normal Operating Mode

P00-P07, P80, P20, P81-P85

P40-P47

P33

P32

EA

RESET, AVDD

Programming Mode

A0-A14

D0-D7

CE

OE

VPP

3.1 Operation Mode

To set the program write/verify mode, set RESET = H and AVDD = L. For the mode, the operation mode can be

selected by setting the CE and OE pins, as listed in Table 3-2.

To read the PROM contents, set the read mode.

Connect the unused pins exactly as indicated on Pin Configuration.

Mode

Program write

Program verify

Program inhibit

Read

Output disable

Standby

Table 3-2. PROM Programming Operation Mode

RESET

H

AVDD

L

CE

OE

VPP

VDD

L

H

+12.5 V

+6 V

H

L

H

H

L

L

+5 V

+5 V

L

H

H

L/H

D0-D7

Data input

Data output

High impedance

Data output

High impedance

High impedance

Caution When VPP is set to +12.5 V and VDD is set to +6V, setting both CE and OE to L is inhibited.

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