EM78P468SL44 datasheet(7/94 Pages) EMC

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EM78P468S

8-Bit Microcontroller

Product Specification (V1.0) 07.28.2016

 1

(This specification is subject to change without prior notice)

General Description

The EM78P468S 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 4.25K

13-bit Electrical One Time

Programmable Read Only Memory (OTP-ROM). The EM78P468S provides multi-protection bits to prevent

intrusion of

user’s 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 EM78P468R 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

 4.25K13 bits on-chip OTP-ROM

 272 bytes SRAM

144 bytes general purpose register

128 bytes on-chip data RAM

 8-level stacks for subroutine nesting

 Power-on voltage detector provided (1.70.1V) for

EM78P468S

 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

 Four (4) programmable high-sink/drive I/O ports:

P5, P6, P7, P8

 Operating Voltage and Temperature Range:

EM78P468S

 Commercial: 2.1V ~ 5.5V. (at 0C ~+70C)

 Industrial: 2.3V ~ 5.5V. (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 5 ~ 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 mode



Peripheral Configuration

 8-bit real Time Clock/Counter (TCC)

 One infrared transmitter/PWM generator function

 Four sets of 8 bits auto reload down-counting timer can

be used as interrupt sources

 Counter 1: independent down-counting 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.

 One Pulse Width Modulation (PWM) with 10 bits

resolution and Dead-time function



Night Interrupt Sources: Two External and Five Internal

 Internal interrupt source: TCC; Counters 1 and 2

High/Low pulse width timer; PWM period/duty

 External interrupt source : INT0/1 and Pin change

wake-up (Port 5 ~ 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 : EM78P468SQ64 (Body 14mm20mm)

 LQFP-64 pin : EM78P468SL64

(Body 7mm

7mm)

 LQFP-44 pin : EM78P468SL44

(Body 10mm

10mm)

 QFP-44 pin : EM78P468SQ44 (Body 10mm10mm)

 QFP-64 pin : EM78P468SQ64B (Body 14mm14mm)

 LQFP-48 pin : EM78P468SL48

(Body 7mm

7mm)

Note: These are Green products which do not contain

hazardous substances

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