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EM78P224N

The EM78P224N is an 8-bit microprocessor with low-power and high-speed CMOS technology and high noise immunity. It has a built-in 4K15-bit and 1768 bits in system programmable SRAM, Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides three protection bits to prevent intrusion of user’s OTP memory code. Seven option bits are also available to meet user’s requirements. With its enhanced OTP-ROM features, the EM78P224N provides a convenient way of developing and verifying user’s programs. Moreover, this OTP 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.

CPU configuration

Support 4K15 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.