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   Product Introduction

The EM78P173N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It has an on-chip 1Kx13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). This device provides a protection bit to prevent intrusion of user’s OTP memory code. Three Code option words are also available to meet user’s requirements.

With its enhanced OTP-ROM features, the EM78P173N provides a convenient way of developing and verifying user’s programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. Users can avail of the ELAN Writer to easily program their development code.

   Product Features

? CPU configuration

? 1Kx13 bits on-chip ROM

? 48x8 bits on-chip registers (SRAM, General purpose)

? 5-level stacks for subroutine nesting

? 4 programmable level voltage detector

LVD : 4.5, 4.0, 3.3, 2.2V

? 3 programmable level voltage reset

LVR : 4.0, 3.5, 2.7V

? Less than 1.5mA at 5V/4 MHz

? Typically 15 μA, at 3V/32kHz

? Typically 1 μA, during Sleep mode

? I/O port configuration

? 2 bidirectional I/O ports : P5, P6

? 12 I/O pins

? Wake-up port : P6

? 7 Programmable pull-down I/O pins

? 7 programmable pull-high I/O pins

? 7 programmable open-drain I/O pins

? External interrupt with wake-up: P60

? Operating voltage range:

? 2.1V~5.5V at 0~70?C (Commercial)

? 2.3V~5.5V at -40~85?C (Industrial)

? Operating frequency range

(base on 2 clocks):

? Crystal mode:

DC~20MHz/2clks @ 5V

DC~8MHz/2clks @ 3V

DC~4MHz/2clks @ 2.1V

? ERC mode:

DC~2 MHz/2clks @ 2.1V

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