EM78911

Features:

•Operating voltage range : 2.5V〜5.5V
•16K* 13 on chip ROM
•2.8K* 8 on chip RAM
•Up to 36 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
•Four modes (internal clock 3.579MHz)
    1. Sleep mode : CPU and 3.579MHz clock turn off, 32.768KHz clock turn off
    2. Idle mode : CPU and 3.579MHz clock turn off, 32.768KHz clock turn on
    3. Green mode : 3.579MHz clock turn off, CPU and 32.768KHz clock turn on
    4. Normal mode : 3.579MHz clock turn on , CPU and 32.768KHz clock turn on
•Ring on voltage detector and low battery detector
•Input port wake up function
•9 interrupt source , 4 external , 5 internal
•100 pin QFP or chip
•Port key scan function
•Clock frequency 32.768KHz
•Eight R-option pins


Application

1. adjunct units
2. answering machines
3. feature phones


Pinout




Specifications

RATING	SYMBOL	VALUE	UNIT
DC SUPPLY VOLTAGE	Vdd	-0.3 To 6	V
INPUT VOLTAGE	Vin	-0.5 to VDD +0.5	V
OPERATING TEMPERATURE RANGE	Ta	0 to 70

Description

The EM78911 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 ,CALL WAITING decoder, DTMF generator and tri-state I/O . The EM78911 provides a single chip solution to design a CID of calling message_display .