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EM78860H Datasheet

  • EM78860H

  • 8-BIT MICRO-CONTROLLER

  • 127.49KB

  • 25页

  • EMC

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EM78860
8-BIT MICRO-CONTROLLER
GENERAL 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 .
FEATURES
CPU
鈥?Operating voltage range :
2.5V~5.5V
鈥?16Kx13 on chip ROM
鈥?2.8Kx8 on chip RAM
鈥?Up to 32 bi-directional tri-state I/O ports
鈥?8 Level stack for subroutine nesting
鈥?8-bit real time clock/counter (TCC)
鈥?Two sets of 8 bit counters can be interrupt sources
鈥?Selective signal sources and with overflow interrupt
鈥?Programmable free running on chip watchdog timer
鈥?99.9% single instruction cycle commands
鈥?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
鈥?Low battery detector
鈥?Input port wake up function
鈥?8 interrupt source , 4 external , 3 internal
鈥?/div>
100 pin QFP or chip
鈥?Port key scan function
鈥?Port interrupt , pull high and open drain functions
鈥?Clock frequency 32.768KHz externally
LCD
鈥?LCD operation voltage chosen by software
鈥?Common driver pins : 16
鈥?Segment driver pins : 60
鈥?1/4 bias
鈥?1/8,1/16 duty
APPLICATION
1. adjunct units
2. data bank
* This specification are subject to be changed without notice.
6.24.1998
1

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