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OTP LCD+ADC Type MCU Series

EM78P468B

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一般描述

特征

General Description

The EM78P468B is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. Integrated onto a single chip are on chip 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 series has an on-chip 4K*13-bit Electrical One Time Programmable Read Only Memory(OTP-ROM). The EM78P468B provides multi-protection bits to prevent intrusion of userˇs OTP memory code. Seven Code option bits are available to meet user's requirements. Special 13 bits customer ID options are provided as well.
With its enhanced OTP-ROM feature, the EM78P468B provides a convenient way of developing and verifying user's programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. Users can avail of the ELAN Writer to easily program their development code.

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

Power-on voltage detector provided (1.7±0.1V) for EM78P468B

I/O Port Configuration

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

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

Up to 28 bidirectional tri-state I/O ports

Operating Voltage and Temperature Range:

Commercial: 2.1V ~ 5.5 V (at 0° ~ 70°)

Industrial: 2.3V ~ 5.5 V (at -40° ~ 85°)

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.

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: 32

LCD Bias: 1/3, 1/2 bias

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

Package Type

Dice form: 59 pins

QFP-64 pin: EM78P468BQ64 (Body 14mm*20mm)

LQFP-64 pin: EM78P468BL64 (Body 7mm*7mm)

LQFP-44 pin: EM78P468BL44 (Body 10mm*10mm)

QFP-44 pin: EM78P468BQ44 (Body 10mm*10mm)

QFP-64 pin: EM78P468BQ64B (Body 14mm*14mm)

LQFP-48 pin: EM78P468BL48(Body 7mm*7mm)

Note: These are Green products which do not contain hazardous substances