EM78P258N is 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It is equipped with a 2K x 13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). With its OTP-ROM feature, it is able to offer a convenient way of developing and verifying your programs. Moreover, it provides a protect bit to guard against code intrusion, as well as 3 Code Option words to accommodate your requirements. Furthermore you can take advantage of ELAN Writer to easily write your development code into the EM78P258N.

Features

• Operating voltage range:
  * 2.3V~5.5V base on 0°C ~ 70°C (commercial)
  * 2.5V~5.5V base on –40°C ~ 85°C (industrial)
• 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
  * IRC mode: DC ~ 4MHz at 2.3~5.5V
     * Process deviation: typ. ±3%, max. ±5%
     * Temperature deviation: ±10% (-40℃ ~ 85℃)
• Low power consumption:
  * Less than 1.9 mA at 5V/4MHz
  * Typically 15 μA, at 3V/32KHz
  * Typically 1 μA, during sleep mode
• Built-in RC oscillator 4MHz, 8MHz,1MHz, 455KHz (auto calibration)
• Programmable WDT time (4.5ms:18ms)
• Independent Programmable prescaler of WDT
• One configuration register to match your requirements, and user's ID code for customer use is provided
• 80 x 8 on chip registers (SRAM, general purpose register)
• 2K x 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
• 8-bit real time clock/counter (TCCA, TCCC) and 16-bit real time clock/counter (TCCB) with selective signal sources, trigger edges, and overflow interrupt
• 4-bit multi-channel Analog-to-Digital Converter with 12-bit resolution
• Easy-implemented IR (Infrared remote control) application circuit
• Power down (SLEEP) mode
• Five interrupt sources:
  * TCC, TCCA, TCCB, and TCCC overflow interrupt
  * Input-port status change interrupt (wake-up from sleep mode)
  * External interrupt
  * IR/PWM interrupt
  * ADC completion 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 or Four clocks per instruction cycle
• Package types:
  * 14 pin DIP 300mil : EM78P258NP
  * 14 pin SOP 150mil : EM78P258NM
• Power on voltage detector available (2.0V ± 0.1V)