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EM78811 Datasheet, PDF (1/33 Pages) ELAN Microelectronics Corp – 8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT | |||
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EMEM7788881111
8-BIT MIC8R-BOIT-CMOICNRTOR-COOLNLTERORLFLOERRFTOERLTEECLOECMOMPRPORODDUUCCTT
GENERAL DESCRIPTION
The EM78811 is an 8-bit CID (Call Identification) 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 , FSK decoder , DTMF generator
and tri-state I/O . The EM78811 provides a single chip solution to design a CID of calling message_display .
FEATURES
CPU
⢠Operating voltage range : 2.5V~5.5V
⢠16K X13 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 trigger edges , and with overflow interrupt
⢠Programmable free running on chip watchdog timer
⢠99.9% single instruction cycle commands
⢠Three modes (internal clock 3.679MHz)
1. sleep mode : CPU and 3.679MHz clock turn off, 32.768KHz clock turn off
2. Idle mode : CPU and 3.679 MHz 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
⢠Ring on voltage detector and low battery detector
⢠Input port wake up function
⢠8 interrupt source , 4 external , 4 internal
⢠100 QFP or chip
⢠Port key scan function
⢠Port interrupt, Pull high and Open drain functions
⢠Clock frequency 32.768KHz
⢠Main clock can switch to 1.84MHz by code option
CID
⢠Operation Volltage 3.5 ~5.5V for FSK
⢠Operation Volltage 2.5 ~5.5V for DTMF
⢠Bell 202 , V.23 FSK demodulator
⢠DTMF generator
⢠Ring detector on chip
LCD
⢠LCD operation voltage chosen by software
⢠Common driver pins : 16
⢠Segment driver pins : 60
⢠1/4 bias
⢠1/8,1/16 duty
* This specification are subject to be changed without notice.
10.12.1998 1
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