KING BILLION ELECTRONICS CO. LTD
HE89R21
HE80000 SERIES
1
V3.1E
A. HE89R21 Introduction
HE8R21 is a member of 8-bit Micro-controller series used for telephone communication developed by
King Billion Electronics Ltd. This IC build-in 128-dot LCD driver, and also have 16-bit I/O port. This IC
built-in a DTMF generator can generate the PSTN dialing tone directly. It can be applicable as Small/
Medium class telephone communication product etc.. It also built-in an Regulator for providing LCD
display well.
The instruction set of HE89R21 are quite easy to learn and simple to use. Only about thirty instructions
with four-type addressing mode are provided. Most of instructions take only 3 oscillator clocks (machine
cycles). The processing power is enough to most of battery operation system.
B. HE89R21 Features
Operation Voltage
2.4V 5.5V
System Clock
DC ~ 8MHz @ 5.0V
DC
~
4MHz
@
2.4V
Internal ROM
16K Bytes(16K Program ROM)
Internal RAM
512
Bytes.
Dual Clock System
Normal (Fast) clock 32.768K ~ 8MHz
Slow
clock
32.768KHz
Operation Mode
DUALFASTSLOWIDLESLEEP Mode.
With WDT (WATCH DOG TIMER) to prevent deadlock condition..
16 bit Bi-directional I/O port. Mask Option can select PUSH-PULL or OPEN DRAIN output mode
for each I/O pin.
128 dots LCD driver (A, B TYPE selectable).
Built-in Regulator for providing LCD a stable operation voltage.
Built-in DTMF Generator.
Two external interrupts and three internal timer interrupts.
Two 16-bit timer and one Time Base timer.
Instruction set 32 instructions, 4 addressing mode. 9-bit DATA POINTER for RAM and 14-bit
TABLE POINTER for ROM.
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