UPD78098 데이터 시트보기 (PDF) - Renesas Electronics

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UPD78098

8-BIT SINGLE-CHIP MICROCONTROLLER

Renesas Electronics 

µPD78P083

4. PROM PROGRAMMING

The µPD78P083 has an internal 24-Kbyte PROM as a program memory. For programming, set the PROM programming

mode with the VPP and RESET pins. For the connection of unused pins, refer to “PIN CONFIGURATIONS (TOP VIEW)

(2) PROM programming mode.”

Caution Programs must be written in addresses 0000H to 5FFFH (The last address 5FFFH must be specified).

They cannot be written by a PROM programmer which cannot specify the write address.

4.1 Operating Modes

When +5 V or +12.5 V is applied to the VPP pin and a low-level signal is applied to the RESET pin, the PROM programming

mode is set. This mode will become the operating mode as shown in Table 4-1 when the CE, OE, and PGM pins are set

as shown.

Further, when the read mode is set, it is possible to read the contents of the PROM.

Table 4-1. Operating Modes of PROM Programming

Pin

Operating Mode

Page data latch

Page write

Byte write

Program verify

Program inhibit

RESET

L

Read

Output disable

Standby

x : L or H

VPP

VDD

CE

+12.5 V

+6.5 V

H

H

L

L

x

x

+5 V

+5 V

L

L

H

OE

PGM

D0 to D7

L

H

H

L

H

L

L

H

H

H

L

L

L

H

H

x

x

x

Data input

High-impedance

Data input

Data output

High-impedance

Data output

High-impedance

High-impedance

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