产品导览

特征

• CPU configuration

• Support 4K�e15 bits program ROM
• 176*8 bits on-chip registers (SRAM)
• 8 level stacks for subroutine nesting
• Dual clock operation mode
• Four programmable Level Voltage Detector
  (LVD) : 4.5V, 4V, 3.3V, 2.2V.
  Four programmable Level Voltage Reset (LVR) : 4.0V,3.5V,2.7V,1.8V(POR)
• Power on reset level Voltage: 1.8V(Reset)~1.9V(Release)
• Less than 1.0 mA at 5V/4MHz
• Typically 15 A, at 3V/16kHz
• Typically 2 A, during sleep mode
• Four operation mode
  

  Mode	CPU	Main Clock	Sub 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 bi-directional I/O ports : P5, P6, P7, P8
• 30 I/O pins
• 8 Programmable open-drain I/O pins
• 24 programmable pull-high I/O pins
• 8 programmable pull-low I/O pins
• 16 programmable high sink I/O pins
• 16 programmable high drive I/O pins
• External interrupt : INT

• Operating voltage range:

• 2.1V~5.5V at 0~70 C (commercial)
• 2.3V~5.5V at -40~85 C (industrial)

• Operating frequency range

• Crystal/IRC oscillation circuit selected by code option for system clock
• IRC oscillation circuit selected by code option for sub clock

Main Clock
• Crystal mode:  
    DC ~ 20MHz at 5V
    DC ~ 8MHz at 3V
    DC ~ 4MHz at 2.1V
• IRC mode:  
    DC ~ 16MHz/2clks at 4.5V
    DC ~ 8MHz/2clks at 3V
    DC ~ 4MHz/2clks at 2.1V
• IRC Drift Rate (Ta=25°C, VDD=5V ± 5%, VSS=0V)  
  

Internal RC Frequency	Drift Rate
	Temperature (-40°C~85°C)	Voltage(2.3V~5.5V)	Process	Total
1MHz	±2%	±3%	±2%	±7%
4MHz	±2%	±3%	±2%	±7%
8MHz	±2%	±3%	±2%	±7%
16MHz	±2%	±3%	±2%	±7%


Sub Clock 
• IRC mode: 32kHz/16kHz

• Peripheral configuration

• 8-bit real time clock/counter (TCC) with selective signal sources and trigger edges
• 8-bit Timer/Counter
  TC1: Timer/Counter/capture/window/buzzer/PWM/PDO (programmable divider output) Mode
• External interrupt wake-up. Function: rising or falling edges interrupt
• Four Port input status change wake-up

• 5 available interrupts

• Special Features

• Programmable free running watchdog timer
• High ESD immunity
• Power saving Sleep mode
• Selectable Oscillation mode

• Package Type:  

• 28-pin DIP 600 mil ; EM78P224ND28
• 28-pin Skinny DIP 400 mil ; EM78P224NK28A
• 28-pin SOP 300 mil ; EM78P224NSO28
• 28-pin SSOP 209mil ; EM78P224SS28
• 32-pin DIP 600 mil ; EM78P224ND32
• 32-pin SOP 450 mil ; EM78P224NSO32
• 32-pin SOP 300 mil ; EM78P224NSO32A

Note: These are all Green product that do not contain hazardous substances.