King Billion Electronics Co., Ltd

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HF88M02

January 16, 2004

Page 2 of 19

V1.11

This specification is subject to change without notice. Please contact sales person for the latest version before use.

1 Function Description

The HF88M02 is a command interfaced 256K x 8 bit Mask ROM. It features command mode interface

with external CPU or MCU. In other words, it uses only 8-bit data bus and a few additional control pins

to load addresses and provide the ROM access as well as expansion I/O ports capability. This design not

only reduces pin count required to access data in ROM dramatically but also allows for systems

expansion to higher capacity memories while using the existing board design. The application areas

include voice, graphic, data storage in consumer product.

2 Features

Data File Mode with only 11 pin interface

Sixteen-bit Expansion I/O pins with three-state mode

Voltage range 2.4V ~ 5.5V

Organization

-

Memory Cell Array: 256K x 8

Sequential Read Operation in Data File Operation Mode

-

Command/Address/Data Multiplexed I/O port

Low Operation Current (Typical)

-

10

µA Standby mode Current

-

10mA Active Read Current

Package bare chip, PLCC32