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EM78F642N

The EM78F642N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology and high noise immunity. It has an on-chip 2K x 13-bit Electrical Flash Memory and 128´8-bit in-system programmable EEPROM. It provides three protection bits to prevent intrusion of user’s Flash memory code. Twelve Code option bits are also available to meet user's requirements.
With its enhanced Flash-ROM features, the EM78F642N provides a convenient way of developing and verifying user's programs. Moreover, this Flash-ROM 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 his development code.

  • CPU configuration
  • 2Kx13 bits on-chip Flash memory
  • 80x8 bits on-chip registers (SRAM)
  • 128 bytes in-system programmable EEPROM

*Endurance: 1000,000 write/erase cycles

  • More than 10 years data retention
  • 8-level stacks for subroutine nesting
  • 3 programmable Level Voltage Reset 

(LVR) : 4.0V, 3.5V, 2.7V

  • Less than 1.5 mA at 5V / 4 MHz
  • Typically 20 uA, at 3V / 32kHz
  • Typically 1.5 uA, during sleep mode
  • I/O port configuration
  • 4 bidirectional I/O ports: P5, P6, P7 and P8
  • 18 I/O pins
  • Wake-up port : P6
  • High sink port : P6
  • 10 programmable pull-high I/O pins
  • 7 programmable pull-down I/O pins
  • 8 programmable open-drain I/O pins
  • External interrupt with Wake-up : P60
  • Operating voltage range
  • 2.4V~5.5V at -40°C~85°C (Industrial)
  • 2.2V~5.5V at 0°C~70°C (Commercial)
  • Operating frequency range (base on two clocks)
  • Crystal mode : DC~16 MHz @ 4.5V~5.5V ; 

DC~8 MHz @ 3V~5.5V ; DC~4 MHz @ 2.2V~5.5V

  • ERC mode : DC~16 MHz @ 4.5V~5.5V ;

DC~8 MHz @ 3V~5.5V ; DC~4 MHz @ 2.2V~5.5V

  • IRC mode : DC~16 MHz @ 4.5V~5.5V ; 

DC~4 MHz @ 2.2V~5.5V

Internal RC Frequency Drift Rate
Temperature (-40°C~85°C) Voltage(2.5V~5.5V) Process Total
4 MHz ±3% ±5% ±2.5% ±10.5%
16 MHz ±3% ±5% ±2.5% ±10.5%
8 MHz ±3% ±5% ±2.5% ±10.5%
455 kHz ±3% ±5% ±2.5% ±10.5%

  • Seven available interrupts
  • Internal interrupt : 4
  • External interrupt : 3
  • One set of comparator (offset voltage: smaller than 5 mV)
  • Two 8-bit Timer/Counter
  • TC1 : Timer/Counter/Capture
  • TC3 : Timer/Counter/PDO (programmable divider output)/PWM (pulse width modulation)
  • One 16-bit Timer/Counter
  • TC2 : Timer only
  • Peripheral configuration
  • 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
  • External interrupt input pin
  • 2/4/8/16 clocks per instruction cycle selected by code option
  • Power down (Sleep) mode
  • High EFT immunity
  • Single instruction cycle commands
  • Special Features
  • Programmable free running Watchdog Timer
  • Power-on voltage detector available (2.0V~2.1V)
  • Package Type:
  • 20-pin DIP 300mil : EM78F642ND20J/S
  • 20-pin SOP 300mil : EM78F642NSO20J/S
  • 18-pin DIP 300mil : EM78F642ND18J/S
  • 18-pin SOP 300mil : EM78F642NSO18J/S
  • 20-pin SSOP 209mil : EM78F642NSS20J/S

Note: Green products do not contain hazardous substances.

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