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)
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