General Description
The EM78P341N, EM78P342N and EM78P343N are 8-bit microprocessors designed and developed with low-power and high-speed CMOS technology. The series have an on-chip 2K×13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides a protection bit to prevent intrusion of user’s OTP memory code. Three Code option bits
are also available to meet user’s requirements.
With enhanced OTP-ROM features, the EM78P341N, EM78P342N and EM78P343N provide 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
- 2K×13 bits on chip ROM
- 80×8 bits on chip registers (SRAM)
- 8 level stacks for subroutine nesting
- 4 programmable Level Voltage Detector (LVD) : 4.5V, 4.0V, 3.3V, 2.2V
- 4 programmable Level Voltage Reset (LVR) : 4.0V, 3.5V, 2.7V, 1.8V (POR)
- Less than 1.5 mA at 5V/4MHz
- Typically 15 μA, at 3V/32kHz
- Typically 1 μA, during sleep mode
*I/O port configuration
- Three bidirectional I/O ports : P5, P6, P7
- 18 I/O pins
- Wake-up port : P5
- 8 Programmable pull-down I/O pins
- 16 programmable pull-high I/O pins
- 8 Programmable open-drain I/O pins
- External interrupt : P60
*Operating voltage range:
- Commercial version: Operating voltage range: 1.9V~5.5V
- Industrial version: Operating voltage range: 2.1V~5.5V
*Operating temperature range: -40~85°C
- Commercial version: Operating voltage range: 0°C ~ 70°C
- Industrial version: Operating voltage range: -40°C ~ 85°C
*Operating frequency range: Main clock
- Crystal mode:
DC ~ 20MHz/2clks @ 4V; DC ~16 MHz/2clks @ 3V
DC ~ 4MHz/2clks @ 1.9V
- ERC mode:
DC ~ 4MHz/2clks @ 5V; DC ~ 4MHz/2clks @ 3V
DC ~ 8MHz/2clks @ 3V; DC ~ 250ns inst. cycle @ 3V
- IRC mode:
Oscillation mode : 4MHz, 16MHz, 1MHz, 455kHz
Process deviation : Typ±3%, Max±5%
Temperature deviation : ±10% (-40°C~85°C )
*Peripheral configuration
- Easily implemented IR (or infrared remote control)
- 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
- 8-bit real time clock/counter (TCCA, TCCC) and 16-bit real time clock/counter (TCCB) with selective signal sources, trigger edges, and overflow interrupt
- 8-bit channels Analog-to-Digital Converter with 12-bit resolution
- One pair of comparators or OP
*Seven available interrupts:
- TCC, TCCA, TCCB, TCCC overflow interrupt
- Input-port status changed interrupt (wake-up from sleep mode)
- External interrupt
- ADC completion interrupt
- IR/PWM interrupt
- Comparator status change interrupt
- Low voltage detect (LVD) interrupt
*Special features
- Programmable free running watchdog timer (4.5ms:18ms)
- Power saving Sleep mode
- Selectable Oscillation mode
- Power-on voltage detector available (1.7 V± 0.1V)
*Package type:
- 14-pin DIP 300mil : EM78P341NP
- 14-pin SOP 150mil : EM78P341NM
- 18-pin DIP 300mil : EM78P342NP
- 18-pin SOP 300mil : EM78P342NM
- 20-pin DIP 300mil : EM78P343NP
- 20-pin SOP 300mil : EM78P343NM
- 20-pin SSOP 209mil : EM78P343NKM

EM78P341NP, EM78P341NM, EM78P342NP, EM78P342NM, EM78P343NP, EM78P343NM, EM78P343NKM, EM78P343N

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