LC651432N datasheet(1/39 Pages) SANYO

Part #	LC651432N

Description	Four-Bit CMOS Microcontrollers for Small-Scale Control Applications

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Manufacturer	SANYO [Sanyo Semicon Device]

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Ordering number : ENN6498

40700RM (OT) No. 6498-1/39

Overview

The LC651431N/F/L and LC651432N/F/L are the small-

scale control models in Sanyo’s LC6500 Series of 4-bit

microcontrollers and feature the same basic architecture

and instruction set. These microcontrollers are appropriate

for a wide range of applications, from applications that

require only a limited number of circuits and controls and

were previously implemented in standard logic to larger

application such as audio equipment, including tape decks

and disc players, office equipment, communication

equipment, automotive equipment, and home appliances.

Furthermore, since these products have equivalent basic

functions (although there are differences in some functions

and characteristics) and are pin compatible with the earlier

LC6543N/F/L and LC6546N/F/L products, they can be

used to replace those devices.

Features

• Fabricated in a CMOS process for low power operation

(Standby mode can be controlled by CPU instructions.)

• ROM/RAM

LC651432N/F/L

—ROM: 2 K

× 8 bits, RAM: 128 × 4 bits

LC651431N/F/L

—ROM: 1 K

× 8 bits, RAM: 64 × 4 bits

• Instruction set: The 80-instruction set common to the

whole LC6500 Series

• Wide operating supply voltage range of 2.2 to 6.0 V

(L versions)

• Instruction cycle time of 0.92 µs (F versions)

• On-chip serial I/O function

• Highly flexible I/O ports

Number of ports

— 7 ports (Up to 25 pins)

All ports

— Can be used for either input or output

— Voltage handling capability (input and output):

15 V maximum (For open-drain specification ports)

— Output current: 20 mA maximum sink current

(Capable of directly driving an LED.)

I/O port options to match application requirements:

— Open-drain output and pull-up resistor specification:

Can be specified for all ports in bit units.

— Output level at reset specification: Either a high or

low level can be specified for ports C and D in 4-bit

units each.

• Interrupts

Timer overflow vector interrupt (can also be tested by

CPU instructions)

INT pin or serial I/O full/empty vector interrupt (can

also be tested by CPU instructions)

• Stack levels: 4 levels (also used by interrupts)

• Timers: 8-bit programmable timer with 4-bit prescaler

• Clock oscillator options to match application

requirements:

Oscillator circuit option:

— Two-pin RC oscillator (N and L versions)

Two-pin ceramic oscillator or single external clock

input pin (N, F, and L versions)

— Divider circuit option: No divider, built-in divide-

by-three circuit, built-in divide-by-four circuit

(N and L versions)

• Continuous square-wave output with a period 64 times

the cycle time.

LC651432N/F/L, 651431N/F/L

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Four-Bit CMOS Microcontrollers for

Small-Scale Control Applications

CMOS IC

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

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