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PDF EM78P915 Data sheet ( Hoja de datos )
| Número de pieza | EM78P915 | |
| Descripción | 8-BIT MICRO-CONTROLLER | |
| Fabricantes | ELAN Microelectronics | |
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EM78P915
8-BIT MICRO-CONTROLLER
Product
specification v2.0
ELAN MICROELECTRONICS CORP.
No. 12, Innovation 1st RD., Science-Based Industrial Park
Hsin Chu City, Taiwan
TEL: (03) 5639977
FAX: (03) 5630118
1 page  
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EM78P915
8-bit Micro-controller
I. General Description
The EM78P915 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, SDT detector, current DA
module and tri-state I/O. The EM78P915 provides a single chip solution to design a CID of calling message display.
II. Feature
CPU
Operating voltage: 2.2V~5.5V for normal mode
Main CLK (Hz)
Under
0.895M~3.58M
Operating Voltage (min)
2.2V
10.74M
3.1V
2.2V~5.5V for green mode
32K 13 on chip program ROM
2.5K 8 on chip RAM
Up to 44 bi-directional tri-state I/O ports
8 level stack for subroutine nesting
8-bit real time clock/counter (TCC)
Two independent 8 bits up-counter interrupt.
Selective signal sources and trigger edges , and with overflow interrupt
Programmable free running on chip watchdog timer
99.9 single instruction cycle commands
4 step Normal mode CLK : 0.895 , 1.79 , 3.58 , 10.74 MHz generated by internal PLL.
Four operation modes.
1. Sleep mode: CPU and PLL turn off, 32.768KHz clock turn off
2. Idle mode: CPU and PLL turn off, 32.768KHz clock turn on
3. Green mode: PLL turn off, CPU and 32.768KHz clock turn on
4. Normal mode: PLL turn on, CPU and 32.768KHz clock turn on
Universal Low battery detector
Input port wake up function
9 interrupt source, 6 external, 3 internal
Port key scan function
Clock frequency 32.768KHz
oscillator start to stable time will smaller/equal 0.5 sec
SPI
Serial Peripheral Interface (SPI) : a kind of serial I/O interface
Interrupt flag available for the read buffer full or transmitter buffer empty.
Programmable baud rates of communication
Three-wire synchronous communication.(shared with IO )
CID
Operation Voltage 2.4V 5.5V for FSK
Operation Voltage 2.4V 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 2.4V 5.5V
Compatible with Bell-core special report SR-TSV-002476
Call-Waiting (2130Hz plus 2750Hz) Alert Signal Detector
Good talk-down and talk-off performance
Sensitivity compensated by adjusting input OP gain
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
2005/12/21 (V2.0)
5 Page 
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Comparator
CMP1
CURRENT DA
DAOUT1
I (PORT63)
O (PORT66)
DAOUT2
IO
P55 ~P56
P60 ~P63,
P66
P70 ~ P73, P77
O
I/O
I/O
I/O
P80 ~ P87
P90 ~ P97
PB0 ~ PB7
PC0 ~ PC7
INT0
INT2
TEST
/RESET
I/O
I/O
I/O
I/O
PORT70…73
PORT77
I
I
EM78P915
8-bit Micro-controller
Comparator input pins. Shared with PORT63.
Current DA output pin. It can be a control signal for sound
generating.
Shared with PORT66.
Current DA output pin.
PORT 5 can be INPUT or OUTPUT port each bit.
PORT 6 can be INPUT or OUTPUT port each bit.
Internal pull high.
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Auto key scan function.
Interrupt function.
PORT 8 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT 9 can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT B can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
PORT C can be INPUT or OUTPUT port each bit.
Shared with LCD Segment signal.
Interrupt sources, which has the same interrupt flag. Any pin from
PORT70 to PORT73 has a falling edge signal, it will generate a
interruption.
Interrupt source. Once PORT77 has a falling edge or rising edge
signal (controlled by CONT register), it will generate a
interruption.
Test pin into test mode for factory test only. Connect it ground in
application.
Low reset
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
2005/12/21 (V2.0)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM78P915.PDF ] | |
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