Specification
Overview
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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.
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Features & Benefits
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CPU
- Operating voltage range: 2.5V~5.5V
- 16K x 13 on chip ROM
- 2.5K x 8 on chip data 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
- Four operation modes: Sleep mode (CPU and main clock turn off, 32.768KHz clock turn off), IDLE mode (CPU and main clock turn off, 32.768KHz clock turn on), Green mode (main clock turn off, CPU and 32.768KHz clock turn on), Normal mode (main 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 sources, 4 external, 4 internal
- Port key scan function
- Port interrupt, pull high and open drain functions
- External Sub-Clock frequency is 32.768KHz
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CID
- Operation Voltage 3.5V~5.5V for FSK
- Operation Voltage 2.5V~5.5V for DTMF
- Bell 202, V.23 FSK demodulator
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DTMF generator
- Ring detector on chip
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LCD
- LCD operation voltage chosen by software
- Common driver pins: 16
- Segment driver pins: 60
- 1/4 bias
- 1/8, 1/16 duty
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Data Sheet
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Download File
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Package
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Download File
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Technical Information
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Website Link
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