Intel 80C196NU ユーザーズマニュアル

iii

CONTENTS

CHAPTER 1

GUIDE TO THIS MANUAL

1.1

MANUAL CONTENTS ................................................................................................... 1-1

1.2

NOTATIONAL CONVENTIONS AND TERMINOLOGY ................................................ 1-3

1.3

RELATED DOCUMENTS .............................................................................................. 1-5

1.4

ELECTRONIC SUPPORT SYSTEMS ........................................................................... 1-8

1.4.4

World Wide Web .....................................................................................................1-11

1.5

TECHNICAL SUPPORT .............................................................................................. 1-11

1.6

PRODUCT LITERATURE............................................................................................ 1-11

CHAPTER 2

ARCHITECTURAL OVERVIEW

2.1

TYPICAL APPLICATIONS............................................................................................. 2-1

2.2

DEVICE FEATURES ..................................................................................................... 2-2

2.3

BLOCK DIAGRAM......................................................................................................... 2-2

2.3.1

CPU Control ..............................................................................................................2-3

2.3.2

Register File ..............................................................................................................2-3

2.3.3

2.3.3.1

Code Execution ....................................................................................................2-4

2.3.3.2

Instruction Format ................................................................................................2-5

2.3.4

Memory Controller ....................................................................................................2-5

2.3.5

Multiply-accumulate (80C196NU Only) .....................................................................2-6

2.3.6

Interrupt Service ........................................................................................................2-6

2.4

INTERNAL TIMING........................................................................................................ 2-7

2.5

INTERNAL PERIPHERALS......................................................................................... 2-11

2.5.1

I/O Ports ..................................................................................................................2-11

2.5.2

Serial I/O (SIO) Port ................................................................................................2-11

2.5.3

Event Processor Array (EPA) and Timer/Counters .................................................2-11

2.5.4

Pulse-width Modulator (PWM) ................................................................................2-12

2.6

SPECIAL OPERATING MODES ................................................................................. 2-12

2.6.1

Reducing Power Consumption ...............................................................................2-12

2.6.2

Testing the Printed Circuit Board ............................................................................2-13

2.7

DESIGN CONSIDERATIONS FOR 80C196NP TO 80C196NU CONVERSIONS ...... 2-13