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EM78P349N

  EM78P349N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It has an on-chip 2K x 13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM).
With its enhanced OTP-ROM features, the EM78P349N 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. User can avail of the ELAN Writer to easily program his development code.

  • CPU configuration
  • 2K x 13 bits on-chip ROM
  • (160+16) x 8 bits on chip registers (SRAM)
  • 2 uA, during sleep mode
  • I/O port configuration
  • 3 bi-directional I/O ports·
  • 8 programmable pull-down I/O pins
  • 8 programmable pull-high I/O pins
  • 8 programmable open-drain I/O pins
  • 2 external interrupt pins
  • Operating voltage:
  • 2.3V~5.5V at -40°C~85°C (Industrial)
  • Operating frequency range (base on 2 clocks)
  • Crystal mode: 

DC ~ 20 MHz, 5V ; DC ~ 8 MHz, 3V

  • IRC mode: 

DC ~ 8 MHz, 3V 8-level stacks for subroutine nesting

  • 4 programmable Level Voltage Detector (LVD) : 4.5V, 4.0V, 3.3V, 2.2V
  • 3 programmable Level Voltage Reset (LVR) : 4.0V, 3.0V, 2.5V
  • Less than 1.5 mA at 5V/4MHz
  • Typically 15 uA, at 3V/32kHz
  • Typically

Internal RC Frequency Drift Rate
Temperature (-40°C ~85°C) Voltage (2.3V ~ 5.5V) Process Total
4 MHz ± 5% ± 5% ± 4% ± 14%
8 MHz ± 5% ± 5% ± 4% ± 14%
1 MHz ± 5% ± 5% ± 4% ± 14%
455 kHz ± 5% ± 5% ± 4% ± 14%

  • Peripheral configuration
  • 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
  • 15-bit multi-channel Analog-to-Digital Converter with 12-bit resolution
  • Three Pulse Width Modulation (PWM) with 10-bit resolution 
  • Power-down (Sleep) mode
  • Six available interrupts
  • TCC overflow interrupt
  • Input-port status changed interrupt (wake-up from sleep mode)
  • External interrupt
  • ADC completion interrupt
  • PWM period match completion
  • Low voltage detector interrupt
  • Programmable free running Watchdog Timer
  • Power on voltage detector available (1.9V±0.1V)
  • Package Type
  • 24-pin Skinny DIP 300mil : EM78P349NK24S/J
  • 24 pin SOP 300mil : EM78P349NSO24S/J
  • 28-pin Skinny DIP 300mil : EM78P349NK28S/J
  • 28-pin SOP 300mil : EM78P349NSO28S/J

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