NEC PD789488, PD789489, PD78F9488, PD78F9489 - page 12

12 User’s Manual U15331EJ4V1UD
3.1.4 Data memory addressing..............................................................................................................54
3.2 Processor Registers ..................................................................................................................58
3.2.1 Control registers............................................................................................................................58
3.2.2 General-purpose registers.............................................................................................................61
3.2.3 Special function registers (SFRs)..................................................................................................62
3.3 Instruction Address Addressing ..............................................................................................66
3.3.1 Relative addressing.......................................................................................................................66
3.3.2 Immediate addressing...................................................................................................................67
3.3.3 Table indirect addressing.............................................................................................................. 68
3.3.4 Register addressing...................................................................................................................... 68
3.4 Operand Address Addressing ..................................................................................................69
3.4.1 Direct addressing.......................................................................................................................... 69
3.4.2 Short direct addressing................................................................................................................. 70
3.4.3 Special function register (SFR) addressing...................................................................................71
3.4.4 Register addressing...................................................................................................................... 72
3.4.5 Register indirect addressing..........................................................................................................73
3.4.6 Based addressing......................................................................................................................... 74
3.4.7 Stack addressing...........................................................................................................................74
CHAPTER 4 PORT FUNCTIONS...........................................................................................................75
4.1 Port Functions............................................................................................................................ 75
4.2 Port Configuration .....................................................................................................................76
4.2.1 Port 0............................................................................................................................................ 77
4.2.2 Port 1............................................................................................................................................ 78
4.2.3 Port 2............................................................................................................................................ 79
4.2.4 Port 3............................................................................................................................................ 84
4.2.5 Port 5............................................................................................................................................ 86
4.2.6 Port 6............................................................................................................................................ 87
4.2.7 Port 7............................................................................................................................................ 89
4.2.8 Port 8............................................................................................................................................ 90
4.3 Registers Controlling Port Function ........................................................................................91
4.4 Port Function Operation............................................................................................................ 94
4.4.1 Writing to I/O port..........................................................................................................................94
4.4.2 Reading from I/O port....................................................................................................................94
4.4.3 Arithmetic operation of I/O port..................................................................................................... 94
CHAPTER 5 CLOCK GENERATOR......................................................................................................95
5.1 Clock Generator Functions....................................................................................................... 95
5.2 Clock Generator Configuration ................................................................................................95
5.3 Registers Controlling Clock Generator ...................................................................................98
5.4 System Clock Oscillators ........................................................................................................101
5.4.1 Main system clock oscillator........................................................................................................101
5.4.2 Subsystem clock oscillator..........................................................................................................102
5.4.3 Example of incorrect resonator connection................................................................................. 103
5.4.4 Divider circuit...............................................................................................................................104