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EM78F542N

The EM78F542N is an 8-bit microprocessor designed and developed with low-power, highspeed
CMOS technology, and high noise immunity. It has an on-chip 2K×13-bit Electrical Flash
Memory. 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 EM78F542N 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.
You can avail of the ELAN Writer to easily program your development codes.

  • CPU Configuration
  • 2K×13 bits on-chip Flash memory
  • 80×8 bits on-chip registers (SRAM)
  • 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 μA, at 3V / 32kHz
  • Typically 1.5 μA, during sleep mode
  • I/O Port Configuration
  • 4 bidirectional I/O ports: P5, P6, P7, & 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)
  • 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
  • Operating Frequency Range (Base On Two Clocks)
  • Crystal Mode: DC~16MHz @ 4.5V~5.5V;

             DC~8MHz @ 3V~5.5V;

             DC~4MHz @ 2.2V~5.5V

  • ERC Mode: DC~16MHz @ 4.5V~5.5V;

                                       DC~8MHz @ 3V~5.5V;

                                       DC~4MHz @ 2.2V~5.5V

  • IRC mode: DC~16MHz @ 4.5V~5.5V;

                                      DC~4MHz @ 2.2V~5.5V

Internal RC 
Frequency
Drift Rate
Temperature

(-40°C~85°C)

Voltage

(2.5V~5.5V)

Process Total
4MHz ± 3% ± 5% ± 2.5% ± 10.5%
16MHz ± 3% ± 5% ± 2.5% ± 10.5%
8MHz ± 3% ± 5% ± 2.5% ± 10.5%
455kHz ± 3% ± 5% ± 2.5% ± 10.5%

  • Seven Available Interrupts
  • Internal interrupt: 4
  • External interrupt: 3
  • One Set of Comparator (Offset Voltage: Lower than 5 mV)
  • Two 8-bit Timer/Counter
  • TC1: Timer/Counter/Capture
  • TC3: Timer/Counter/PDO (programmable divider output)/PWM (pulse width modulation)
  • Special Features
  • Programmable free running Watchdog Timer
  • Power-on voltage detector available (2.0V ~ 2.1V)
  • Package Type:
  • 20-pin DIP 300 mil:EM78F542ND20J/S
  • 20-pin SOP 300 mil:EM78F542NSO20J/S
  • 18-pin DIP 300 mil:EM78F542ND18J/S
  • 18-pin SOP 300 mil:EM78F542NSO18J/S
  • 20-pin SSOP209mil:EM78F542NSS20J/S

Note: These are all Green Products which do not contain hazardous substances.

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