EM78860数据手册Elan中文资料规格书

描述 Description

The EM78860 is an 8-bit RISC type microprocessor with low power , high speed CMOS technology . Integrated onto a single chip are on-chip watchdog (WDT) , RAM , ROM , programmable real time clock /counter , internal interrupt , power down mode , LCD driver and tri-state I/O . The EM78860 provides a single chip solution to design a message display .

特性 Features

CPU Operating voltage range : 2.5V~5.5V
16K x 13 on chip ROM
2.8K x 8 on chip RAM
Up to 32 bi-directional tri-state I/O ports
8 Level stack for subroutine nesting
8-bit real time clock/counter (TCC)
Two sets of 8 bit counters can be interrupt sources
Selective signal sources and with overflow interrupt
Programmable free running on chip watchdog timer
99.9% single instruction cycle commands
Four modes (internal clock 3.679MHz, external 32.768KHz)
1. Sleep mode : CPU and 3.679MHz clock turn off, 32.768KHz clock turn off
2. Idle mode : CPU and 3.679MHz clock turn off, 32.768KHz clock turn on
3. Green mode : 3.679MHz clock turn off, CPU and 32.768KHz clock turn on
4. Normal mode : 3.679MHz clock turn on , CPU and 32.768KHz clock turn on
Low battery detector
Input port wake up function
8 interrupt source , 4 external , 3 internal
100 pin QFP (EM78860AQ, POVD disable) (EM78860BQ, POVD enable) or chip (EM78860H)
Port key scan function
Port interrupt , pull high and open drain functions
Clock frequency 32.768KHz externally
LCD LCD operation voltage chosen by software
Common driver pins : 16
Segment driver pins : 60
1/4 bias
1/8,1/16 duty