The EM78F644N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology and high noise immunity. It has an on-chip 4Kx13-bit Electrical Flash Memory and 256x8-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 feature, the EM78F644N 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. User can avail of the ELAN Writer to easily program his development code.
- 4K x 13 bits Flash memory
- 144 x 8 bits on chip registers (SRAM)
- 256 bytes in-system programmable EEPROM
- Endurance: 100,000 write/erase cycles
- More than 10 years data retention
- 8-level stacks for subroutine nesting
- Less than 2 mA at 5V/4MHz
- Typically 20 uA, at 3V/32kHz
- Typically 2 uA, during sleep mode
- 4 bidirectional I/O ports: P5, P6, P7, P8
- 25 I/O pins
- Wake-up port : P6
- 14 programmable pull-high I/O pins
- 14 programmable pull-down I/O pins
- 8 programmable open-drain I/O pins
- External interrupt with Wake-up : P60
- Operating voltage: 2.4V~5.5V at -40°C ~85°C (Industrial)
- Operating voltage: 2.2V~5.5V at 0°C ~70°C (Commercial)
- Operating frequency range (base on two clocks):
DC ~ 16MHz @ 4.5V
DC ~ 8MHz @ 3V
DC ~ 4MHz @ 2.2V
DC ~ 16MHz @ 5V
DC ~ 8MHz @ 3V
DC ~ 4MHz @ 2.2V
DC ~ 16MHz @ 4.5V~5.5V
DC ~ 4MHz @ 2.2V~5.5V
- Fourteen available interrupts:
- Internal interrupt : 10
- External interrupt : 3
- One set of comparator (offset voltage: smaller than 10 mV)
- Two channel Pulse Width Modulation (PWM ) with 10-bit resolution
- Two 8-bit Timer/Counter
- TC1 : Timer/Counter/Capture
- TC3 : Timer/Counter/PDO (programmable divider output)/PWM (pulse width modulation)
- TC2 : Timer/Counter/Window
- Serial transmitter/receiver interface
- Serial Peripheral Interface (SPI) : Three-wire synchronous communication
- Universal Asynchronous Receiver / Transmitter (UART)
- 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
- Programmable free running watchdog timer
- Package type:
- 24-pin SKDIP 300mil :EM78F644NK24J/S
- 24-pin SOP 300mil :EM78F644NSO24J/S
- 28-pin SKDIP 300mil :EM78F644NK28J/S
- 28-pin SOP 300mil :EM78F644NSO28J/S
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