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MSM64P155
User's Manual
CMOS 4-bit microcontroller
FIRST EDITION
ISSUE DATE: Mar. 1996
NOTICE
1.
The information contained herein can change without notice owing to product and/or
technical improvements. Before using the product, please make sure that the information
being referred to is up-to-date.
The outline of action and examples for application circuits described herein have been
chosen as an explanation for the standard action and performance of the product. When
planning to use the product, please ensure that the external conditions are reflected in the
actual circuit, assembly, and program designs.
When designing your product, please use our product below the specified maximum
ratings and within the specified operating ranges including, but not limited to, operating
voltage, power dissipation, and operating temperature.
Oki assumes no responsibility or liability whatsoever for any failure or unusual or
unexpected operation resulting from misuse, neglect, improper installation, repair, alteration
or accident, improper handling, or unusual physical or electrical stress including, but not
limited to, exposure to parameters beyond the specified maximum ratings or operation
outside the specified operating range.
Neither indemnity against nor license of a third party’s industrial and intellectual property
right, etc. is granted by us in connection with the use of the product and/or the information
and drawings contained herein. No responsibility is assumed by us for any infringement
of a third party’s right which may result from the use thereof.
The products listed in this document are intended for use in general electronics equipment
for commercial applications (e.g., office automation, communication equipment,
measurement equipment, consumer electronics, etc.). These products are not authorized
for use in any system or application that requires special or enhanced quality and reliability
characteristics nor in any system or application where the failure of such system or
application may result in the loss or damage of property, or death or injury to humans.
Such applications include, but are not limited to, traffic and automotive equipment, safety
devices, aerospace equipment, nuclear power control, medical equipment, and life-support
systems.
Certain products in this document may need government approval before they can be
exported to particular countries. The purchaser assumes the responsibility of determining
the legality of export of these products and will take appropriate and necessary steps at their
own expense for these.
No part of the contents contained herein may be reprinted or reproduced without our prior
permission.
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Copyright 1996 Oki Electric Industry Co., Ltd.
Printed in Japan
Preface
MSM64P155 is a 4-bit microcontroller, which uses
built-in one time PROM (OTP) in place of built-in mask
ROM in MSM64155A.
MSM64P155 is manufactured with the N-well EPROM
process instead of the P-well CMOS process.
That is why the polarity of MSM64P155's power
supply is different than the polarity of the chip with the
P-well CMOS structure.
OTP version chips alone are not supplied to custom-
ers.
This manual explains the specific hardware of
MSM64P155 and the differences from the mask ROM
version of MSM64155A.
See "MSM64155 User's Manual" for further reference
relating to other hardware and instruction set.
TABLE OF CONTENTS
Chapter 1 General Description
1.1
1.2
1.3
1.4
1.5
Overview ................................................................................................................. 1-1
Features .................................................................................................................. 1-1
Block Diagram ........................................................................................................ 1-3
Pin Configuration .................................................................................................... 1-4
Explanation of Pins ................................................................................................. 1-5
1.5.1 Explanation of Each Pin ................................................................................ 1-5
1.5.2 PROM-Related Pins .................................................................................... 1-10
1.5.3 Processing of Unused Pins ........................................................................ 1-11
Chapter 2 Power Supply System
2.1 Overview ................................................................................................................. 2-1
2.2 Power Supply System Circuit Configuration .......................................................... 2-2
2.3 Logic Power Supply and Backup Circuits .............................................................. 2-3
2.3.1 Configuration of Logic Power Supply ........................................................... 2-3
2.3.2 Operations of Optional 1.5V Logic Power Supply Circuits ........................... 2-4
2.3.3 Operations of Optional 3.0V Logic Power Supply Circuits ........................... 2-4
Chapter 3 Crystal Oscillation Circuit
3.1 Overview ................................................................................................................. 3-1
3.2 Configuration of Crystal Oscillation Circuit ............................................................ 3-1
Chapter 4 PROM
4.1 Overview ................................................................................................................. 4-1
4.2 Explanation of Pins ................................................................................................. 4-1
4.3 PROM Mode ........................................................................................................... 4-3
4.3.1 Setting the PROM Mode .............................................................................. 4-3
4.3.2 PROM Mode Functions ................................................................................ 4-3
4.3.3 Connection to the EPROM Writer ................................................................. 4-4
Chapter 5 TST3 Pin
5.1 Overview ................................................................................................................. 5-1
5.2 Registers To Be Changed By TST3 ........................................................................ 5-3
Appendixes
Appendix A Package Dimensional Drawing .................................................... Appendix-1
Appendix B Electrical Characteristics ............................................................. Appendix-2
Chapter 1
GENERAL DESCRIPTION
