EM78P258N
8-Bit Microprocessor with OTP ROM
1 General Description
EM78P258N are 8-bit microprocessors designed and developed with low-power and
high-speed CMOS technology. It is equipped with a 2K*13-bit Electrical One Time
Programmable Read Only Memory (OTP-ROM). With its OTP-ROM feature, it is able
to offer a convenient way of developing and verifying your programs. Moreover, it
provides a protect bit to guard against code intrusion, as well as 3 Code Option words
to accommodate your requirements. Furthermore you can take advantage of ELAN
Writer to easily write your development code into the EM78P258N.
2 Features
ꢀ Operating voltage range:2.3V~5.5V base on 0°C ~ 70°C (commercial)
2.5V~5.5V base on –40°C ~ 85°C (industrial)
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Operating frequency range (base on 2 clocks):
• Crystal mode:DC ~ 20MHz/2clks, 5V; DC ~ 8MHz/2clks, 3V
• RC mode: DC ~ 4MHz/2clks, 5V; DC ~ 4MHz/2clks, 3V
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Low power consumption:
• Less than 1.9 mA at 5V/4MHz
• Typically 15 µA, at 3V/32KHz
• Typically 1 µA, during sleep mode
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Built-in RC oscillator 4MHz, 8MHz,1MHz, 455KHz (auto calibration)
Programmable WDT time (4.5ms:18ms)
Independent Programmable prescaler of WDT
One configuration register to match your requirements, and user’s ID code for
customer use is provided
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80× 8 on chip registers (SRAM, general purpose register)
2K × 13 on chip ROM
Bi-directional I/O ports
8-level stacks for subroutine nesting
8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and
overflow interrupt
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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
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4-bit multi-channel Analog-to-Digital Converter with 12-bit resolution
Easy-implemented IR (Infrared remote control) application circuit
Product Specification (V1.0) 06.16.2005
• 1
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
