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• CPU Configuration

• 8K x 13 bits on-chip ROM
• 272x8 bits on-chip registers (SRAM)
• 8-level stacks for subroutine nesting
• Dual clock operation or PLL operation mode
• Four operation mode: Normal, Green, Idle, Sleep
• Four programmable Level Voltage Detector (LVD) : 3.9V, 3.3V, 2.7V, 2.4V
• Four programmable Level Voltage Reset (LVR) : 3.9V, 3.3V, 2.6V, 2.1V(POR)
• Less than 2.1 mA at 5V/4MHz
• Typically 22 uA, at 3V/32kHz
• Typically 8 uA, during sleep mode
• Single Instruction Cycle Commands

• I/O Port Configuration

• 6 bi-directional I/O ports : P7, P8, P9, PA, PB, PC
• 43 I/O pins
• 8-pin Direct Drive LED
• 39 Programmable open-drain I/O pins
• 43 programmable pull-high I/O pins
• External interrupt : P74~P77, PB0~PB3, P82~P83

• Operating voltage range:?

OTP version:

• Operating voltage range : 2.3V~5.5V

• Operating temperature range : -40~85°C
• Operating frequency range:

• Crystal/RC oscillation circuit selected by code option for system clock
• 32.768kHz crystal/RC oscillation circuit selected by code option for sub-oscillatio

Main Clock

• Crystal mode:?

DC~20MHz/2 clks @ 5V; DC~100ns inst. Cycle @ 5V

DC~8MHz/2 clks @ 3V; DC~250ns inst. Cycle @ 3V

DC~4MHz/2 clks @ 2.3V; DC~500ns inst. Cycle @ 2.3V

• ERIC mode:?

DC~2.2MHz/2 clks @ 2.3V; DC~909ns inst. Cycle @ 2.3V

• PLL mode:?

DC~16MHz/2 clks @ 5V; DC~125ns inst Cycle @ 5V

Sub Clock

• Crystal mode: 32.768kHz
• ERIC mode: 33kHz (2.2MW)

• Peripheral Configuration

• Serial peripheral interface (SPI) available
• 8-bit real time clock/counter (TCC)
• 12-channels Analog-to-Digital Converter with 12-bit resolution in Vref mode
• LCD: 8x23 dots, bias (1/2, 1/3, 1/4), duty (static, 1/3, 1/4, 1/8)
• Two 8-bit timers
• 8-bit Timer 1, auto reload counter/timer which can be an interrupt source. Function mode; Timer, Toggle output, UART baud rate generator, Capture, PWM
• 8-bit Timer 2, auto reload timer which can be aninterrupt source. Function mode; Timer, SPI baud rate generator, PWM
• Two sets of 8 bits auto reload counter/timer which can be cascaded to one 16-bit counter/timer
• Universal asynchronous receiver / transmitter (UART) available
• Four programmable watch timer: 1.0 sec, 0.5 sec, 0.25sec, 3.91ms
• Four programmable buzzer output: 0.5kHz, 1kHz, 2kHz, 4kHzn?

• Eighteen available interrupts:

• TCC overflow interrupt
• Ten External interrupts?

(wake-up from sleep mode)

• ADC completion interrupt
• Two timer interrupt
• Watch timer interrupt
• Two serial I/O interrupt
• Low voltage detect (LVD)

• Special Features

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

• Package Type:

• 32 pin SDIP 400mil : EM78P520NK32A
• 32 pin SOP 450mil : EM78P520NSO32
• 44 pin QFP 10x10mm : EM78P520NQ44
• 44 pin LQFP 10x10mm : EM78P520NL44
• 48 pin LQFP 7x7mm : EM78P520NL48

Note: Green product do not contain hazardous substances