LC651431L データシートの表示（PDF） - SANYO -> Panasonic

部品番号

コンポーネント説明

メーカー

LC651431L

Four-Bit CMOS Microcontrollers for Small-Scale Control Applications

SANYO -> Panasonic 

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

5. I/O pins

All of the pins on these microcontrollers are shared-function I/O pins.

• When used as input pins, insert limiting resistors and keep the connection lines as short as possible.

Supplement: This can be effective in preventing or avoiding microcontroller problems (such as malfunctions and

program runaway), not only in printed circuit board design, but in selecting the microcontroller option

types discussed below and when considering application program specifications.

• If signals are input when the microcontroller power supply is unstable, select the medium-voltage (n-channel open

drain) output as the output circuit type for that pin, and also insert a limiting resistor as close to the pin as possible.

• Always adopt key bounce elimination techniques when inputting external signals to any microcontroller pin.

• Periodically refresh the pin output data with an output instruction (OP or SPB).

• When reading data input to a shared-function (bidirectional) I/O pin, set the value of the output data for that pin to 1

on every read operation with an output instruction (OP or SPB).

6. Unused pins

• Refer to the pin functions table in the user’s manual for the product itself or in the relevant Sanyo Semiconductor

Development Report.

The information presented in this document consists of examples, and its use is not guaranteed in mass-produced end

products. In actual product design (including the selection of circuit component values), we strongly recommend

using the materials presented here as a reference and performing thorough evaluation and testing.

Specifications of any and all SANYO products described or contained herein stipulate the performance,

characteristics, and functions of the described products in the independent state, and are not guarantees

of the performance, characteristics, and functions of the described products as mounted in the customer’s

products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,

the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all

semiconductor products fail with some probability. It is possible that these probabilistic failures could

give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,

or that could cause damage to other property. When designing equipment, adopt safety measures so

that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective

circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained

herein are controlled under any of applicable local export control laws and regulations, such products must

not be exported without obtaining the export license from the authorities concerned in accordance with the

above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or

mechanical, including photocopying and recording, or any information storage or retrieval system,

or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to

product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”

for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not

guaranteed for volume production. SANYO believes information herein is accurate and reliable, but

no guarantees are made or implied regarding its use or any infringements of intellectual property rights

or other rights of third parties.

This catalog provides information as of April, 2000. Specifications and information herein are subject to

change without notice.

PS No. 6498-39/39

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