General Description
The EM78P330/331N is an 8-bit microprocessors designed and developed with low-power and high-speed CMOS technology. It has an on-chip 8K×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 its enhanced OTP-ROM feature, the EM78P330N 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
- 8K×13 bits on chip ROM
- 144×8 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 2.2 mA at 5V/4MHz
- Typically 15 μA, at 3V/32kHz
- Typically 1 μA, during sleep mode
*I/O port configuration
- 4 bidirectional I/O ports : P5, P6, P7, P8
- 29 I/O pins
- Wake-up port : P6
- 29 Programmable pull-down I/O pins
- 29 programmable pull-high I/O pins
- External interrupt : P52, P53
*Operating voltage range:
- OTP version: Operating voltage range: 2.1V~5.5V
*Operating temperature range: -40~85°C
*Operating frequency range:Main clock
- Crystal mode:
DC~20MHz/2clks @ 5V; DC~100ns inst. cycle @ 5V
DC~8MHz/2clks @ 3V; DC ~ 250ns inst. cycle @ 3V
- ERC mode:
DC~16MHz/2clks @ 5V; DC~125ns inst. cycle @ 5V
DC~8MHz/2clks @ 3V; DC~250ns inst. cycle @ 3V
- IRC mode:
Oscillation mode : 4MHz, 8MHz, 1MHz, 455kHz
Process deviation : Typ±3%, Max±5%
Temperature deviation : ±5% (-40°C~85°C )
Sub clock
Crystal: 32.768kHz
All these four main frequencies can be trimmed by programming with four calibrated bits in the ICE330N Simulator. OTP is auto trimmed by ELAN Writer
*Peripheral configuration
- Serial peripheral interface (SPI) available
- 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
- 8-bit channels Analog-to-Digital Converter with 12-bit resolution in Vref mode
- Three Pulse Width Modulation (PWM ) with 10-bit resolution
- One pair of comparators or OP
- One 10-bit timer. Two 10-bit timer with selective signal sources and trigger edges. All of these have interrupt function.
*Eight available interrupts:
- TCC overflow interrupt
- Input-port status changed interrupt (wake-up from sleep mode)
- Two External interrupt
- ADC completion interrupt
- PWM time period match completion interrupt
- Comparator high/low interrupt
- 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 types:
- 28 pin DIP 600mil : EM78P330NPS/J
- 28 pin SOP 300mil : EM78P330NMS/J
- 28 pin SDIP 400mil : EM78P330NKS/J
- 28 pin SDIP 300mil : EM78P330NAKS/J
- 32 pin LQFP : EM78P331NQS/J
- 32 pin SDIP 400mil : EM78P331NKS/J
- 32 pin DIP 600mil : EM78P331NPS/J
- 32 pin SOP 300mil : EM78P331NMS/J
Note: Green products do not contain hazardous substances.

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