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The EM78P202N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. The device has as an on-chip 2K’13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a protection bit to prevent intrusion of user’s OTP memory code. Two Code option bits are also available to meet user’s requirements. With its enhanced OTP-ROM features, the device 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. Users can avail of the ELAN Writer to easily program their development code.

  • CPU configuration
  • 2Kx13 bits on-chip OTP-ROM
  • 80x8 bits on-chip registers (SRAM)
  • 8-level stacks for subroutine nesting
  • 3 programmable Level Voltage Reset (LVR) : 4.0V, 3.0V, 2.5V
  • Less than 1.5 mA at 5V/4MHz
  • Typically 15 mA, at 3V/32kHz
  • Typically 2 mA, during sleep moden 
  • I/O port configuration
  • 4 bidirectional I/O ports: P5, P6, P7 and P8
  • Wake-up port : P6
  • 18 I/O pins
  • 8 programmable pull-down I/O pins
  • 6 programmable pull-high I/O pins
  • 4 programmable open-drain I/O pins
  • 12 Programmable high sink current I/O pins
  • 8 Programmable high drive current I/O pins
  • External interrupt : P77, P71
  • Operating voltage range:
  • OTP version: 

Operating voltage range: 2.1V~5.5V (commercial)

Operating voltage range: 2.3V~5.5V (industrial)

  •  Operating temperature range: 

Operating temperature range: 0°C~70°C (commercial)

Operating temperature range: -40°C~85°C (industrial)

  • Operating frequency range 
  • Crystal mode: 

DC~16MHz/2 clks @ 4.5V; DC~125ns inst. Cycle @ 4.5V

DC ~ 8MHz/2 clks @ 3V; DC~250ns inst. Cycle @ 3V

  • ERC mode: 

DC ~ 16MHz/2 clks @ 4.5V; DC~125ns inst. Cycle @ 5V

DC ~ 8MHz/2 clks @ 3V; DC ~ 250ns inst. Cycle @ 3V

  • IRC mode: 

Oscillation mode: 16MHz, 4 MHz, 1 MHz, 455kHz

Process deviation: Max. ± 3%

Temperature deviation: ± 5% (-40°C~85°C)

Internal RC Frequency Drift Rate
Temperature(-40°C~85°C) Voltage(2.1V~5.5V) Process Total
4MHz ±5% ±5% ±3% ±13%
16MHz ±5% ±5% ±3% ±13%
1MHz ±5% ±5% ±3% ±13%
455kHz ±5% ±5% ±3% ±13%

All the four main frequencies can be trimmed by programming with four calibrated bits in the ICE210N Simulator. OTP is auto trimmed by ELAN Writer (DWTR)

  • Fast set-up time requires only 800ms (VDD:5V,Crystal: 4MHz, C1/C2: 20pF) in XT mode and 10ms inIRC mode (VDD:5V IRC:4MHz)
  • Peripheral configuration
  • 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
  • One comparator (can act as an OP).(offset voltage is smaller than 10mV) 
  • Five available interrupts
  • TCC overflow interrupt
  • Input-port status changed interrupt (wake up from sleep mode)
  • Two External interrupts
  • Comparator high/low interrupt
  • Special Features
  • Programmable free running Watchdog Timer
  • Two clocks per instruction cycle
  • Power-on voltage detector available (1.9 V± 0.2V)
  • High EFT immunity (better performance at 4MHz or below
  • Power saving Sleep mode
  • Selectable Oscillation mode
  • Package Type:  
  • 20-pin DIP 300mil : EM78P202ND20J/S
  • 20-pin SOP 300mil : EM78P202NSO20J/S
  • 18-pin DIP 300mil : EM78P202ND18J/S
  • 18-pin SOP 300mil : EM78P202NSO18J/S

Note: Green products do not contain hazardous .substances.

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