• CPU configuration

• Support 4Kx15 bits program ROM
• 304x8 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
• Typically 2μA, during sleep mode
• Four operation modes

Mode	CPU	Main clock	WDT clock
Sleep mode	Turn off	Turn off	Turn off
Idle Mode	Turn off	Turn off	Turn on
Green mode	Turn on	Turn off	Turn on
Normal mode	Turn on	Turn on	Turn on

• I/O port configuration

• 4 bidirectional I/O ports : P5, P6, P7, P8
• Pin change wake-up port : P6
• 30 programmable pull-down I/O pins
• 30 programmable pull-high I/O pins
• 30 programmable open-drain I/O pins
• 30 programmable high-sink/drive I/O pins
• 8 programmable open-drain I/O pins
• External interrupt : P60

• Operating voltage range

• 2.4V~5.5V at 0°C~70°C (commercial)
• 2.6V~5.5V at -40°C~85°C (industrial)

• Operating frequency range (base on 2 clocks)

• IRC mode : DC~16MHz at 4.5V~5.5V ; DC~8MHz at 3V~5.5V ; DC~4MHz at 2.4V~5.5V
• Internal RC Drift Rate (Ta=25°C, VDD=5V±5%, VSS=0V)

Internal RC Frequency	Drift Rate
	Temperature (-40°C~85°C)	Voltage (2.5V~5.5V)	Process	Total
4MHz	±2%	±2%	±2%	±6%
8MHz	±2%	±2%	±2%	±6%
16MHz	±2%	±2%	±2%	±6%

• Peripheral configuration

• 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• Two Pulse Width Modulation (PWMA, PWMB) with 10-bit resolution shared with Timers A and B
• One 8-bit Timer/Counter : 
  TC3 : Timer/Counter/PWM/PDO(programmable divider output) mode select
• 8 channels Analog-to-Digital Converter with 12-bit resolution in Vref mode
• Power-down(Sleep) mode
• High EFT immunity (4 MHz, 2 clocks)
• I²C function with 7/10 bits address and 8 bits data transmit/receive mode

• 10 available interrupts (2 external, 8 internal)

• External interrupt(P60)
• TCC overflow interrupt
• TC3 overflow interrupt
• Input-port status changed interrupt (wake-up from sleep mode)
• ADC completion interrupt
• PWMA, PWMB period match completion
• I²C transfer/receive/stop interrupt

• Programmable free running Watchdog Timer

• Watchdog Timer : 16.5ms±5% with Vdd =5V at 25°C, Temperature range±5% (-40°C ~+85°C)
• Watchdog Timer : 18ms ± 5% with Vdd = 3V at 25°C
• Temperature range±5% (-40°C~+85°C)
• Two clocks per instruction cycle

• Single instruction cycle commands

• Package Type

• 32 pin QFN : EM78F665NQN32J/S
• 28 pin SKDIP : EM78F665NK28J/S
• 28 pin SOP : EM78F665NSO28J/S

Note: Green products do not contain hazardous substances.