King Billion Electronics Co., Ltd.

駿

億

電

子

股

份

有

限

公

司

HE89C21

HE80000 SERIES

January 20, 2003

1

V1.0E

- Table of Contents -

1.

General Description ___________________________________________________________________1

2.

Features _____________________________________________________________________________2

3.

Pin Description _______________________________________________________________________2

4.

Pad Diagram _________________________________________________________________________4

5.

Pad Coordinations ____________________________________________________________________4

6.

LCD Power Supply____________________________________________________________________5

6.1.

LCDC Control register ______________________________________________________________6

7.

LCD RAM Map ______________________________________________________________________6

8.

Oscillators ___________________________________________________________________________7

9.

General Purpose I/O___________________________________________________________________8

10.

Timer1 ____________________________________________________________________________9

11.

Timer2 ___________________________________________________________________________10

12.

Watch Dog Timer __________________________________________________________________12

13.

Low Voltage Reset _________________________________________________________________13

14.

Dual-Tone Multiple Frequency Generator______________________________________________13

15.

Absolute Maximum Rating __________________________________________________________14

16.

Recommended Operating Conditions _________________________________________________15

17.

AC/DC Characteristics _____________________________________________________________15

18.

Application Circuit_________________________________________________________________16

19.

Important Note ____________________________________________________________________16

20.

Updated Record ___________________________________________________________________16

1. General Description

HE89C21 is a member of 8-bit Micro-controller series developed by King Billion Electronics for telecom

applications. This chip has 4-COM x 32-SEG LCD driver with built-in regulator to provide stable visual

effect over the battery life, 16-bit general purpose I/O port, DTMF generator for the dialing tone

generation. It is suitable for application in feature telephone products.

The instruction set of HE80000 are easy to learn and simple to use. Thirty-two instructions with four-type