EM78452WM datasheet(5/54 Pages) EMC

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EM78452

8-Bit Microcontroller

Product Specification (V1.0) 10.18.2007

• 1

(This specification is subject to change without further notice)

General Description

The EM78452 is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS

technology. It has 4K

×13-bit on-chip ROM and 140×8-bit on-chip general purpose registers. Its operational

kernel is implemented with RISC-like architecture and it is available in mask ROM version. The one time

programmable (OTP) version is flexible, in both mass production and engineering test stages.

OTP

provides users with unlimited volume along with favorable price opportunities. This device is equipped with

Serial Peripheral Interface (SPI) function, and it is suitable for wired communication.

There are 58

easy-to-learn instructions and the user’s program can be emulated with the EMC In-Circuit Emulator (ICE).

Features

CPU configuration

•

×13 bits on-chip ROM

•

140

×8 bits on chip general purpose registers

•

11 special function registers

•

5-level stacks for subroutine nesting

Low power consumption:

•

Less than 3 mA at 5V/4MHz

•

Typically 10

μA during sleep mode

I/O port configuration

•

5 bidirectional I/O ports (35 I/O pins)

•

12 Wake-up pins

•

32 programmable pull-high input pins

•

2 open-drain I/O pins

•

2 R-option pins

Operating voltage range: 1.8V ~ 5.5V

Operating temperature range: 0°C ~70°C

Operating frequency range (base on two clocks):

•

Crystal mode:

DC ~ 20MHz @ 5V

DC ~ 16MHz @ 2.2V

DC ~ 4MHz @ 1.8V

Serial Peripheral Interface (SPI)

Four available interrupts:

•

External interrupt (/INT)

•

SPI transmission completed interrupt

•

TCC overflow interrupt

•

Timer 1 overflow interrupt

Peripheral configuration

•

8-bit real time clock/counter (TCC) with overflow

interrupt

•

Power down mode

•

I/O ports have Programmable wake-up function

from sleep mode

2 ~ 4 machine clocks for each instruction cycle

3 LED Direct sinking pins with internal serial resistors

Built-in power-on reset

Programmable free running on-chip watchdog timer

Package Type:

•

40-pin DIP 600mil

EM78452P

•

40-pin SOP 450mil

EM78452WM

•

44-pin QFP

EM78452AQ

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