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• CPU configuration

• 1k * 13 bits on-chip ROM
• 48 * 8 bits on-chip registers (SRAM, general purpose)
• 5 level stacks for subroutine nesting
• 3 programmable level voltage reset?
  LVR : 4.0, 3.5, 2.7V
• Less than 1.5 mA at 5V / 4MHz
  
• Typically 15 μA at 3V / 32kHz
• Typically 1 μA during Sleep mode

• I/O port configuration

• 2 bidirectional I/O ports : P5, P6
• 12 I/O pins
• Wake-up port : P6
• 7 Programmable pull-down I/O pins
• 8 programmable pull-high I/O pins
• 8 programmable open-drain I/O pins
• 2 programmable R-option pins
• External interrupt : P60

• Operating voltage range:

• 2.1V ~ 5.5V at 0 ~ 70(C (Commercial)
• 2.3V ~ 5.5V at -40 ~ 85(C (Industrial)

• Operating frequency range(base on 2 clocks)

• Crystal mode:??
  DC ~ 20MHz / 2clks @ 5V
  DC ~ 8MHz / 2clks @ 3V
  DC ~ 4MHz / 2clks @ 2.1V
• IRC mode:?

Internal RC Frequency	Drift Rate
	Temperature (-40°C~85°C)	Voltage	Process	Total
4MHz	±1%	±3% @ 2.1~5.5V	±2%	±6%
16MHz	±1%	±1% @ 4.0~5.5V	±2%	±4%
8MHz	±1%	±2% @ 3.0~5.5V	±2%	±5%
1MHz	±1%	±3% @ 2.1~5.5V	±2%	±6%

• ERC mode: DC ~ 2MHz / 2clks @ 2.1V

• Peripheral configuration

• 8-bit real time clock / counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
• 2 / 4 clocks per instruction cycle selected by code option
• High EFT immunity

• Three available interrupts

• TCC overflow interrupt
• Input-port status changed interrupt (wake-up from sleep mode)
• External interrupt

• Special Features

• Programmable free running watchdog timer
• Power saving sleep mode
• Selectable oscillation mode

• Package Type:??

• 18-pin DIP 300mil : EM78P156KD18J
• 18-pin SOP 300mil : EM78P156KSO18J
• 20-pin SSOP 209mil : EM78P156KJSS20J

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

? ? ? 芯片手冊下載:
? ? ?EM78P156K芯片數據手冊