EM78871
8-BIT MICRO-CONTROLLER
Version 1.5
ELAN MICROELECTRONICS CORP.
No. 12, Innovation 1
st
RD., Science-Based Industrial Park
Hsin Chu City, Taiwan, R.O.C.
TEL: (03) 5639977
FAX: (03) 5630118
EM78871
8-bit Micro-controller
Version History
Specification Revision History
Content
Preliminary
Version
EM78871
1.0
Initial version
1.1
Remove Package
1.2
Modify Idle mode current
1.3
Modify Code option
1.4
Modify Package type
1.5
Remove Idle Mode Function
Release Date
2003/06/05
2003/06/18
2003/08/07
2004/02/09
2004/03/15
2004/08/23
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* This specification is subject to be changed without notice.
2
8/23/04 (V1.5)
EM78871
8-bit Micro-controller
User Application Note
1. ROM, OTP, ICE
ROM
EM78871
OTP
EM78P808
ICE
ICE 808
EM78P808
VDD or 2V
O
O
EM78871
VDD or 2V
X
X
(R6 page1 bit0-7&R7 page1
bit0- 7&R8 page1 bit0-7& R9 page1
bit0-1 unused)
X(unused)
X(unused)
X(unused)
2. The difference between ICE 808 , EM78P808 and EM78871 are listed in the table
ICE 808
Comparator reference voltage VDD
Stack pointer
O
Data Rom
O
RE page1 bit4
IOCE page1 bit0-1
RE page1 bit7-6
IOCE page2 bit0-2, bit4-6
code option bit0
O
O
O
O
O
O
3. "While switching main clock (regardless of high freq to low freq or on the other hand), adding 6
instructions delay (NOP) is required."
4. For DATA RAM least address(A0~A7), when using “INC” instruction and overflow occur,
the middle address will auto_increase. If using “DEC” instruction and least address from
0x00 0xFF, the middle address can’t auto_decrease.
5. When Tip and Ring signals come, user cans choice one of FSK or DTMF receiver to decode.
The Operation Registers Setup as follows:
FSK
DTMF
FSK or DTMF
(RA PAGE0 bit 3)
(IOC9 PAGE1 bit 7)
0
0
All decoder off
0
1
DTMF on
FSK off
1
X
FSK on
(don’t care)
DTMF off
6.Die Pin difference
Pin
EGIN1
EGIN2
Power PAD
Gnd PAD
EM78P808
136 pins
V
V
2(VDD pin & AVDD pin)
2(AVSS pin & GND pin)
EM78871
132 pins
X
X
1(VDD/AVDD pin)
1(AVSS/GND pin)
7.Don’t switch to sleep mode from normal mode directly. Before do this, please
switch to green mode first.
8.Don’t allow enable Idle Mode Function. (RA Page0 bit 7 don’t allow set to 1)
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* This specification is subject to be changed without notice.
3
8/23/04 (V1.5)
EM78871
8-bit Micro-controller
I.General Description
The EM78871 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, program ROM, programmable real time
clock/counter, external/internal interrupt, power down mode, LCD driver, FSK decoder, Call waiting decoder, DTMF
receiver, Programming Tone generator, build-in KEY TONE clock generation, Comparator and tri-state I/O. The
EM78871 provides a single chip solution to design a CID of calling message display.
II.Feature
CPU
•Operating
voltage range : 2.2V~5.5V(Normal mode), 2.0V~5.5V(Green mode)
•32K×13
on chip Program ROM
•4K×8
on chip data RAM
•144
byte working register
•Up
to 51 bi-directional tri-state I/O ports (32 shared with LCD Segment pins)
•IO
with internal Pull high, wake-up and interrupt functions
•STACK:
32 level stack for subroutine nesting
•TCC:
8-bit real time clock/counter (TCC) with 8-bit prescaler
•COUNTER1:
8-bit counter with 8-bit prescaler can be an interrupt source
•COUNTER2:
8-bit counter with 8-bit prescaler can be an interrupt source
•Watch
Dog : Programmable free running on chip watchdog timer
•CPU
modes:
Mode
CPU status
Main clock
32.768kHz clock status
Sleep mode
Turn off
Turn off
Turn off
Green mode
Turn on
Turn off
Turn on
Normal mode Turn on
Turn on
Turn on
•13
interrupt source , 8 external , 5 internal
•Key
Scan : Port key scan function up to 16x4 keys
•Sub-Clock:
32.768KHz crystal
•Main-clock:
3.5862MHz multiplied by 0.25, 0.5, 1 or 3 generated by internal PLL
•Key
tone output :4KHz, 2KHz ,1KHz (shared with IO)
•Comparator:
3-channel comparators: internal (16 level) or external reference voltage. (shared with IO)
•Serial
Peripheral Interface (SPI): Interrupt flag available for the read buffer full, Programmable baud rates of
communication, Three-wire synchronous communication. (shared with IO)
Current D/A
•Operation
Voltage : 2.5V∼5.5V
•7-bit
resolution and 3-bit output level control
•Current
DA output can drive speaker through a transistor for sound playing. (shared with IO)
Programmable Tone Generators
•Operation
Voltage 2.2V∼5.5V
•Programmable
Tone1 and Tone2 generators
•Independent
single tone generation for Tone1 and Tone2
•Mixed
dual tone generation by Tone1 and Tone2 with 2dB difference
•Can
be programmed for DTMF tone generation
•Can
be programmed for FSK signal (Bell202 or V.23) generation
CID
•Operation
Voltage 2.7V∼5.5V for FSK
•Operation
Voltage 2.7V∼5.5V for DTMF receiver
•Compatible
with Bellcore GR-30-CORE (formerly as TR-NWT-000030)
•Compatible
with British Telecom (BT) SIN227 & SIN242
•FSK
demodulator for Bell 202 and ITU-T V.23 (formerly as CCITT V.23)
CALL WAITING
•Operation
Voltage 2.6V∼5.5V
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
4
8/23/04 (V1.5)
EM78871
8-bit Micro-controller
•Compatible
with Bellcore special report SR-TSV-002476
•Call-Waiting
(2130Hz plus 2750Hz) Alert Signal Detector
•Good
talkdown and talkoff performance
•Sensitivity
compensated by adjusting input OP gain
LCD (8x80, 9x80, 16x80, 24x72)
•Maximum
common driver pins : 16/24
•Maximum
segment driver pins : 80(SEG0..SEG79)/72(SEG8..SEG79)
•Shared
COM16 ~ COM23 pins with SEG0 ~ SEG7 pins
•1/4
bias for 8, 9 and 16 common mode and 1/5 bias for 24 common mode
•1/8,
1/9, 1/16, 1/24 duty
•16
Level LCD contrast control (software)
•Internal
resistor circuit for LCD bias
•Internal
voltage follower for better display
Die type
•132
pin die : EM78871H
•128
pin package : (EM78871AQ POVD disable, EM78871BQ POVD enable)
III.Application
1. adjunct units
2. answering machines
3. feature phones
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* This specification is subject to be changed without notice.
5
8/23/04 (V1.5)
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