EM78862B中文資料義隆電子數(shù)據(jù)手冊PDF規(guī)格書

General Description

The EM78862B is an 8-bit RISC type microprocessor with low power, high speed CMOS technology. Integrated into the 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 EM78862B provides a single chip solution for designing DATA-BANK of message display.

Features

CPU

? Operating voltage range: 2.2V ~ 5.5V

? 16K X 13 on chip ROM

? 2.2K X 8 on chip RAM

? Up to 29 bi-directional and 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

? Programmable free running on chip watchdog timer

? Four modes (internal PLL clock 3.579MHz)

?SLEEP Mode: CPU and 3.579MHz clock turn off, 32.768KHz clock turn off

?IDLE Mode: CPU and 3.579MHz clock turn off, 32.768KHz clock turn on

?GREEN Mode: 3.579MHz clock turn off, CPU and 32.768KHz clock turn on

?NORMAL Mode:3.579MHz clock turn on, CPU and 32.768KHz clock turn on

? Input port wake up function

? Seven interrupt sources; 4 external, 3 internal

? 84-pin chip (EM78862BH)

? Port key scan function

? Clock frequency 32.768KHz or RC mode

? Eight R-option pins

LCD

? Software selectable LCD operation voltage

? Common driver pins:9

? Segment driver pins:60

?1/4 bias

? 1/8, 1/9 duty

Applications

?Data Bank

Message display box

?Scientific calculator