UPD784938 Datasheet, PDF (13/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CONTENTS
CHAPTER 1 GENERAL ........................................................................................................................... 39
1.1 Features .................................................................................................................................... 41
1.2 Ordering Information ............................................................................................................... 42
1.3 Pin Configuration (Top View) ................................................................................................. 43
1.3.1 Normal operation mode ............................................................................................................... 43
1.4 Application System Configuration Example (Car Audio (Tuner, Deck)) .......................... 45
1.5 Block Diagram .......................................................................................................................... 46
1.6 List of Functions ...................................................................................................................... 47
1.7 Differences among Products in µPD784938 Subseries ..................................................... 50
1.8 Main Differences with µPD784908 Subseries ...................................................................... 50
CHAPTER 2 PIN FUNCTIONS ............................................................................................................... 51
2.1 Pin Function Lists .................................................................................................................... 51
2.1.1 Normal operation mode ............................................................................................................... 51
2.2 Pin Functions ........................................................................................................................... 55
2.2.1 Normal operation mode ............................................................................................................... 55
2.3 Input/Output Circuits and Connection of Unused Pins ..................................................... 62
2.4 Cautions .................................................................................................................................... 65
CHAPTER 3 CPU ARCHITECTURE ...................................................................................................... 67
3.1 Memory Space .......................................................................................................................... 67
3.2 Internal ROM Area .................................................................................................................... 73
3.3 Base Area .................................................................................................................................. 74
3.3.1 Vector table area .......................................................................................................................... 75
3.3.2 CALLT instruction table area ....................................................................................................... 76
3.3.3 CALLF instruction entry area ...................................................................................................... 76
3.4 Internal Data Area .................................................................................................................... 77
3.4.1 Internal RAM area ........................................................................................................................ 78
3.4.2 Special function register (SFR) area ........................................................................................... 81
3.4.3 External SFR area ....................................................................................................................... 81
3.5 External Memory Space .......................................................................................................... 81
3.6 µPD78F4938 Memory Mapping ............................................................................................... 82
3.7 Control Registers ..................................................................................................................... 83
3.7.1 Program counter (PC) .................................................................................................................. 83
3.7.2 Program status word (PSW) ........................................................................................................ 83
3.7.3 Use of RSS bit ............................................................................................................................. 86
3.7.4 Stack pointer (SP) ........................................................................................................................ 88
3.8 General-Purpose Registers .................................................................................................... 92
3.8.1 Configuration ................................................................................................................................ 92
3.8.2 Functions ...................................................................................................................................... 94
3.9 Special Function Registers (SFR) ......................................................................................... 97
3.10 Cautions .................................................................................................................................... 103
CHAPTER 4 CLOCK GENERATOR ...................................................................................................... 105
4.1 Configuration and Function ................................................................................................... 105
Preliminary User’s Manual U13987EJ1V0UM00
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