EM78P257AP datasheet(4/91 Pages) EMC

4 / 91 page

EM78P257

OTP ROM

This specification is subject to change without prior notice.

07.27.2004 (V1.4)

2. 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

µA, at 3V/32KHz

* typical of 1

µA, 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

EM78P257AP Datasheet(PDF) 4 Page - ELAN Microelectronics Corp