Filter
Top Products
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, fCC)
→ Unless otherwise specified, the
µ
PD754244 (crystal/ceramic oscillation, fX) 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 fX as fCC.
• 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