IBM EM78P809N manual Cpu, Bit Microcontroller

EM78P809N

8-Bit Microcontroller

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.

2Features

2.1CPU

„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

Product Specification (V1.0) 07.26.2005 • 1

(This specification is subject to change without further notice)