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EM78P257, EM78P257A, EM78P257A/B

Table of contents:
Info of EM78P257
Info of EM78P257A
Info of EM78P257A/B

EM78P257, EM78P257A, EM78P257A/B Selling Leads, Datasheet

MFG:EMC Package Cooled:106 D/C:06+

EM78P257, EM78P257A, EM78P257A/B Picture

EM78P257, EM78P257A, EM78P257A/B Datasheet download

Five Points

Part Number: EM78P257

MFG: EMC

Package Cooled: 106

D/C: 06+

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EM78P257 General Description

EM78P257A/B is an 8-bit microprocessors with low-power, high speed CMOS technology. It features a 2K*13 bits Electrical One Time Programmable Read Only Memory (OTP -ROM) and provides a protect bit to prevent from intruding on code, as well as 12 Option bits to accommodate user's requirements.

EM78P257 Maximum Ratings

Temperature under bias            0 to 70
Storage temperature            -65to 150
Input voltage                     -0.3V to +6.0V
Output voltage                  -0.3V to +6.0V

EM78P257 Features

• Operating voltage range: 2.3V~5.5V
• Operating temperature range: 0°C~70°C
• Operating frequency range: (Base on 2 clocks)
    * Crystal mode: DC ~ 20MHz/2clks,5V; DC ~ 8MHz/2clks,3V
    * RC mode: DC ~ 4MHz/2clks,5V; DC ~ 4MHz/2clks,3V
• Low power consumption:
    * less then 1.5 mA at 5V/4MHz
    * typical of 15 mA, at 3V/32KHz
    * typical of 1 mA, during the sleep mode
• Built-in RC oscillator(4MHz,1MHz,455KHz,32.768KHz)
• RC oscillator mode with Internal Capacitor
• Programmable oscillator set-up time (1ms:18ms)
• Independent Programmable prescaler of WDT.
• One configuration register to match the user's requirements, and provide user's ID code for customer use
• 80´ 8 on chip registers (SRAM, general purpose register)
• 2K´ 13 on chip ROM
• Bi-directional I/O ports.
• 8 level stacks for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt.
• 4 sets of comparators.
• Easy-implemented IR (Infrared remote control) application circuit.
• Easy-implemented MOUSE application circuit.
• Power down (SLEEP) mode
• Five interrupt sources
    * TCC overflow interrupt
    * Input-port status changed interrupt(wake up from the sleep mode)
    * External interrupt
    * IR OUT interrupt
    * Comparators status change interrupt
• Programmable free running watchdog timer
• 8 programmable pull-high I/O pins
• 8 programmable open-drain I/O pins
• 8 programmable pull-down I/O pins.
• Two clocks per instruction cycle.
• Package types:
    * 18 pin DIP 300mil : EM78P257AP
    * 20 pin DIP 300mil : EM78P257BP
    * 18 pin SOP 300mil : EM78P257AM
    * 20 pin SOP 300mil : EM78P257BM
    * 20 pin SSOP 209mil : EM78P257AKM

EM78P257 Connection Diagram

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