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參數(shù)資料
| 型號(hào)： | EM73470 |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 4-Bit Micro-Controller for Telecom Product(用于數(shù)字應(yīng)答控制器的4位微控制器) |
| 中文描述： | 4位微電信產(chǎn)品（用于數(shù)字應(yīng)答控制器的4位微控制器控制器） |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 126K |
| 代理商： | EM73470 |
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EM73470
4-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT
8.1.1998
* This specification are subject to be changed without notice.
GENERAL DESCRIPTION
EM73470 is a highly-integrated digital answering machine controller in which control function and signal
amplification capability are integrated into a monolithic device. The EMC EM73400 based 4-bit controller
contains 4K-byte ROM, 244-nibble RAM, 5 interrupt sources, a melody generator, two 12-bit timer/
counters, a time-based interrupt and 14 general purpose I/O pins to provide interfaces with keyboard, LED
display, DAA circuit, tape mechanism etc. Total component counts and production cost can therefore be
reduced.
The linear amplifier portion combines all necessary amplifiers with Automatic Level Control function for
signal amplification and conditioning, analog switches and digital attenuator, designed to provide the most
integrated design for the Single Deck Tape-Based Telephone Answering Device applications.
FEATURES
4-bit controller of EM73470 is based on EMC EM73400 family which provides:
Operating voltage
: 4.5 to 5.5 V. (System clock frequency : 480K to 4.19 MHz).
Clock source
: Single clock system available for resonator or crystal and external clock source by
mask option.
Instruction set
: 110 powerful instructions with cycle time of less than 2
μ
s (fosc=4.19MHz)
ROM capacity
: 4K x 8 bits.
RAM capacity
: 244 x 4 bits.
Input port
: 2 port (3 bits)
Port 12
: Schmitt trigger. (CSH2, SCH1)
Port 14/ (Wakeup)
: Pull up resistor and sleep/hold releasing function are available by mask option.
I/O port
: 5 ports (19 bits)
Port 1, 2
: push-pull or NMOS open drain, high current output for driving LED.
Port 6, 7
: R-option, push-pull or open drain available by mask option.
Port 8,9
: Initial high/low, push-pull or open drain available by mask option.
12-bit Timer/Counters : Two 12-bit Timer/Counters are programmable for timer, event counter, or pulse
width measurement mode.
Built-in Time Base
: 8 kinds of frequencies.
Subroutine nesting
: Up to 13 levels.
Interrupt
: External ...
2 Input interrupt sources.
Internal ....
2 Timer overflow interrupts. 1 Time base interrupt.
Power saving function : Sleep function, CPU hold internal state and stop oscillating.
Hold function, CPU hold internal state and oscillator still working.
Data Pointer (DP)
: Data conversion or table look-up.
Built-in melody
: Programmable melody generator.
High current output ports for driving LED display.
Built-in Amplifiers for Telephone Answering Device Application.
Pre-Amplifier for Tape Head, Microphone, Telephone Line signal Amplification
Automatic Level Control to accommodate wide range of signal amplitude
Amplifier with adjustable gain by external components.
LineO and Speaker amplifier buffer.
Sixteen stage digital attenuator for implementing Digital Volume Control with no extra cost.
Complete set of analog switches configurable for all operation modes required by TAD applications.
Package: SDIP42
Patent Number : 61007 (R.O.C)
Patent Pending : 83216083 (R.O.C)
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