EM78P211N and EM78P212N are 8-bit microprocessors 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 user's programs. Moreover, user can take advantage of ELAN Writer to easily program his development code.

• CPU configuration

  • 2K x 13 bits on chip ROM
  • 80 x 8 bits on chip registers (SRAM)
  • 8 level stacks for subroutine nesting
  • 3 programmable Level Voltage Reset (LVR) : 4.0V,3.0V,2.5V(POR)
  • Less than 1.5 mA at 5V/4MHz
  • Typically 15 uA, at 3V/32KHz
  • Typically 2 uA, during sleep mode

  I/O port configuration

  • 4 bi-directional I/O ports : P5,P6,P7,P8
  • 18 I/O pins
  • Wake-up port : P6
  • 8 Programmable pull-down I/O pins
  • 8 programmable pull-high I/O pins
  • 8 programmable open-drain I/O pins
  • External interrupt : P77,P71

  Operating voltage range

  • OTP version: 2.1V ~ 5.5V(commercial)

  Operating temperature range

  • -40 ~ 85℃

  Operating frequency range: Main clock

  • Crystal mode:
    * DC ~ 16MHz/2clks @ 4.5V; DC ~ 125ns inst. Cycle @ 4.5V
    * DC ~ 8MHz/2clks @ 3V;DC ~ 250ns inst. Cycle @ 3V
  • ERC mode:
    * DC ~ 16MHz/2clks @ 4.5V;DC ~ 125ns inst. Cycle @ 4.5V
    * DC ~ 8MHz/2clks @ 3V;DC ~ 250ns inst. Cycle @ 3V
  • IRC mode:
    * Oscillation mode : 16MHz,4MHz,1MHz,455KHz
    * Process deviation : TYP±4%, MAX±5%
    * Temperature deviation : ±5%(-40℃ ~ 85℃)

  Peripheral configuration

  • 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
  • One comparator (The offset for one of them is small than 10mV. )

  Five available interruptions

  • TCC overflow interrupt
  • Input-port status changed interrupt (wake-up from sleep mode)
  • Two External interrupt
  • One timer match the period of corresponding PWM
  • Comparator high/low interrupt

  Special features

  • Programmable free running watchdog timer
  • Two clocks per instruction cycle
  • Power on Reset
  • High EFT immunity
  • Power saving Sleep mode
  • Selectable Oscillation mode

  Package types

  • 20 pin DIP 300mil: EM78P211NP
  • 20 pin SOP 300mil: EM78P211NM
  • 20 pin SSOP 209mil: EM78P211NAM
  • 24 pin skinny DIP 300mil: EM78P212NK
  • 24 pin SOP 300mil: EM78P212NM
  • 24pin SSOP 209 mil: EM78P212NAM