NEC PD789488 User Manual page 12

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
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User's Manual U15331EJ4V1UD