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EM78P809N
8-Bit Microcontroller
Product Specification (V1.0) 07.26.2005
• 1
(This specification is subject to change without further notice)
1 General Description
The EM78P809N is an 8-bit microprocessor with low-power, high-speed CMOS
technology and high noise immunity. It has a built-in 8K×13-bits Electrical One Time
Programmable Read Only Memory (OTP-ROM). It provides multi-protection bits to
prevent intrusion of user’s OTP memory codes. Seven Option bits are also available to
meet user’s requirements.
With its OTP-ROM feature, the EM78P809N is able to offer a convenient way of
developing and verifying user’s programs. Moreover, user can take advantage of
ELAN Writer to easily program his development code.
2 Features
2.1 CPU
Operating voltage: 2.5V~5.5V
Operating temperature range: -40°C~85°C
Operating frequency range (base on 2 clocks)
z Crystal mode: 1MHz ~ 8MHz at 4.5V, 1MHz ~ 4MHz at 2.5V
z RC mode: 1MHz ~ 4MHz at 2.5V
Low power consumption:
z Typically 0.8 μA, during sleep mode
8K × 13 bits on-chip ROM
Multi-security bits to prevent intrusion of OTP memory codes
One configuration register accommodates user’s requirements
144 × 8 bits on-chip registers (SRAM, general purpose register)
4 bi-directional I/O ports (22 pins)
z High sink current output pin: 14 pins
z 10 programmable pull high I/O pins
z 10 programmable pull low I/O pins
8 level stacks for subroutine nesting
High performance MCU: Two clocks per instruction cycle
15 interrupts (External: 9, Internal: 6)
Programmable free running watchdog timer