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OTP LCD+ADC Type MCU Series

EM78470N

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一般描述

特征

General Description

The EM78470N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It is integrated with Watchdog Timer (WDT), Data RAM, ROM, programmable real time clock counter, internal/external interrupt, power-down mode, LCD driver, infrared transmitter function, and tri-state I/O. The microprocessor is equipped with an on-chip 4K*13-bit Electrical Mask Read Only Memory (Mask-ROM) and provides multi-protection bits to prevent intrusion of user's Mask memory code. Seven Code option bits are available for user's requirements. Special 13 bits customer ID options are also provided.

Features

CPU Configuration

4K*13 bits on-chip OTP-ROM

144 bytes general purpose register

128 bytes on-chip data RAM

272 bytes SRAM

8-level stacks for subroutine nesting

I/O Port Configuration

Typically, 12 bidirectional tri-state I/O ports.

13 bidirectional tri-state I/O ports shared with LCD segment output pin.

Up to 25 bidirectional tri-state I/O ports

Operating Voltage and Temperature Range

Commercial: 1.9V ~ 3.6 V (at 0°C ~ 70°C)

Industrial: 2.1V ~ 3.6 V (at -40°C ~ 85°C)

Operating Mode

Normal mode : The CPU is operated on main oscillator frequency (Fm)

Green mode : The CPU is operated on sub-oscillator frequency(Fs) and main oscillator(Fm) is stopped.

Idle mode: CPU idle, LCD display remains working

Sleep mode: The whole chip stops working

Input port wake-up function (Port 6, Port 8):Works on Idle and Sleep mode.

Operation speed: DC ~ 10 MHz clock input.

Dual clock operation

Oscillation Mode

High frequency oscillator can select among Crystal, RC, or PLL(phase lock loop)

Low frequency oscillator can select between Crystal or RC modeIRC mode:

Peripheral Configuration

8-bit real Time Clock/Counter(TCC)

One infrared transmitter/PWM generator function

Four sets of 8 bits auto reload down-count timer can be used as interrupt sources

Counter 1:independent down-count timer

Counter 2:High Pulse Width Timer(HPWT), and Low Pulse Width Timer (LPWT) shared with IR function.

Programmable free running on-chip Watchdog Timer(WDT). This function can operate in Normal, Green and Idle mode.

Input port wake-up function(Port 6, Port 8)
Works under Idle and Sleep modes.

Power-on reset and 3 programmable Level Voltage Reset
POR: 1.8V (Default), LVR :2.7V, 2.4V, 2.1V

Eight Interrupt Sources: Three External and Five Internal

Internal interrupt source: TCC; Counters 1, 2; High/Low pulse width timer.

External interrupt source : INT0, INT1 and Pin change wake-up (Port 6 and Port 8)

LCD Circuit

Common driver pins: 4

Segment driver pins: 17

LCD Bias: 1/3, 1/2 bias

LCD Duty: 1/4, 1/3, 1/2 duty

Package Type

Dice 44-pin EM78470NH

LQFP 44-pin EM78470NL44 (10mm*10mm)