7
User’s Manual U10676EJ3V0UM
INTRODUCTION
Readers
This manual is intended for user engineers who wish to understand the functions of
the
µ
PD754144 and 754244 and design application systems using these microcontrollers.
Purpose
This manual is intended to give users an understanding of the hardware functions of
the
µ
PD754144 and 754244 described in the
Organization
below.
Organization
This manual contains the following information.
•
General
•
Pin Functions
•
Features of Architecture and Memory Map
•
Internal CPU Functions
•
EEPROM
•
Peripheral Hardware Functions
•
Interrupt Functions and Test Functions
•
Standby Functions
•
Reset Functions
•
Mask option
•
Instruction Set
How to Read This Manual
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
•
To users who use this manual as a manual for
µ
PD754144 (RC oscillation, f
CC
)
→
Unless otherwise specified, the
µ
PD754244 (crystal/ceramic oscillation, f
X
) is
treated as the representative model in this manual. Check the functional
differences between the
µ
PD754144 and
µ
PD754244 by referring to
1.3
Differences Between
µ
PD754144 and 754244
, and take the
µ
PD754244 as
µ
PD754144 and f
X
as f
CC
.
•
To check the functions of an instruction whose mnemonic is known,
→
Refer to
APPENDIX C INSTRUCTION INDEX
.
•
To check the functions of a specific internal circuit,
→
Refer to
APPENDIX D HARDWARE INDEX
.
•
To understand the overall functions of the
µ
PD754144 and 754244,
→
Read this manual in the order of the
CONTENTS
.
Conventions
Data significance:
Higher digits on the left and lower digits on the right
Active low representations:
×××
(overscore over pin and signal name)
Note
:
Footnote for item marked with
Note
in the text.
Caution
:
Information requiring particular attention
Remark
:
Supplementary information
Numerical representations:
Binary
...
××××
or
××××
B
Decimal
...
××××
Hexadecimal
...
××××
H
