椐?鍎?闆?瀛?鑲?錕?frac12; 鏈?闄?鍏?鍙?/div>
HE89A22
HE80000 SERIES
A. HE89A22 Introduction
HE89A22 is a member of 8-bit Micro-controller series used for telephone communication developed by
King Billion Electronics Ltd. Users can chose any one of combination among
銆?20
dots LCD Driver + 8
Bit I/O Port銆戔€︺€?4 dots LCD Driver + 40 Bit I/O Port銆慹tc. This also built-in a DTMF generator can
generate the PSTN dialing tone directly. It can be applicable as Medium / High level
communication product etc..
telephone
The instruction set of HE89A22 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. HE89A22 Features
2.4V 鈥?5.5V
DC ~ 8MHz @ 5.0V
DC ~ 4MHz @ 2.4V
Internal ROM錛?/div>
16K Bytes(16K Program ROM)
Internal RAM錛?/div>
512 Bytes.
Dual Clock System
錛?/div>
Normal (Fast) clock錛?32.768K ~ 8MHz
Slow clock錛?/div>
32.768KHz
Operation Mode錛?/div>
DUAL銆丗AST銆丼LOW銆両DLE銆丼LEEP Mode.
With WDT (WATCH DOG TIMER) to prevent deadlock condition..
8~40 bit Bi-directional I/O port. Mask Option can select PUSH-PULL or OPEN DRAIN output
mode for each I/O pin.
320~64 dots LCD driver (A, B TYPE selectable).(Only provide 1/4 Bias)
Built-in DTMF Generator.
Two external interrupts and three internal timer interrupts.
Two 16-bit timer and one Time Base timer.
Instruction set錛?32 instructions, 4 addressing mode. 9-bit
DATA POINTER
for RAM and 14-bit
TABLE POINTER
for ROM.
Operation Voltage錛?/div>
System Clock錛?/div>
C. Important Note
1. LCD driving circuit must be turn off before IC goes into sleep mode.
2. Please bonds the TSTP_P, RSTP_N and PRTD[7:0] with test point on PCB (can be soldered and
probed) as you can, then KB can do some IC testing job on PCB. Neither VDD nor GND
connection is necessary for TSTP_P.
The following figure is an example (Testing point with through
hole).
1
V3.2E
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