The EM78P259N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. The device has 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 code. Three Code option words are also available to meet user’s requirements. With its enhanced OTP-ROM feature, the EM78P259N 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. Features CPU configuration • 2K×13 bits on-chip ROM • 80×8 bits on-chip registers (SRAM) • 8-level stacks for subroutine nesting • Less than 1.9 mA at 5V/4MHz • Typically 15 µA, at 3V/32kHz • Typically 1 µA, during Sleep mode I/O port configuration • 3 bidirectional I/O ports : P5, P6, P7 • 17 I/O pins • Wake-up port : P5 • 8 Programmable pull-down I/O pins • 8 programmable pull-high I/O pins • 8 programmable open-drain I/O pins • External interrupt : P60 Operating voltage range • Operating voltage: 2.3V~5.5V (Commercial) All the four main frequencies can be trimmed by programming with four calibrated bits in the ICE259N Simulator. OTP is auto trimmed by ELAN Writer. Peripheral configuration • 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 • 4-bit channel Analog-to-Digital Converter with 12-bit resolution in Vref mode • Easily implemented IR (Infrared remote control) app