EM78815
8-Bit Microcontroller
1 General Description
The EM78815 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), programmable real time clock/counter, external/internal interrupt,
power down mode, EMC65132 LCD controller, FSK decoder, Call waiting decoder,
Energy Detector (DED) , DTMF receiver, Programming Tone generator, build-in
Keytone clock generation, Comparator and tri-state I/O. The EM78815 provides a
single chip solution to design a CID of calling message display.
2 Features
2.1 CPU
Operating voltage range: 2.2V~3.6V(Normal mode), 2.0V~3.6V(Green mode)
64K×13 on-chip Program ROM, supports a max. of 128K word program
256K×8 on-chip data ROM, supports a max. of 2M byte data
4Kx8 data RAM
128×8 common register
Up to 56 bidirectional tri-state I/O ports
IO with internal Pull high, wake-up and interrupt functions
Stack: 24-level stack for subroutine nesting
TCC: 8-bit real time clock/counter (TCC) with 8-bit prescaler
Counter 1: 16 bit counter with 8-bit prescaler can be an interrupt source
Counter 2: 8-bit counter with 8-bit prescaler can be an interrupt source
Watchdog: Programmable free running on-chip watchdog timer
CPU modes:
Mode
CPU Status
Turn off
Main Clock
Turn off
32.768kHz Clock Status
Turn off
Sleep mode
Green mode
Normal mode
Turn on
Turn off
Turn on
Turn on
Turn on
Turn on
15 interrupt source: 8 external, 7 internal
Key Scan: Port key scan function up to 16×4 keys
Sub-Clock: 32.768kHz crystal
Main-clock: 3.5862MHz multiplied by 0.5, 1, 1.5 or 3 generated by internal PLL
Keytone output: 4kHz, 2kHz, 1kHz (shared with IO)
Comparator: 3-channel comparators, internal (16 level) or external reference
voltage (shared with IO)
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
