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User’s Manual U15017EJ2V0UD
3.6
Control Registers ................................................................................................................56
3.6.1
Program counter (PC) ............................................................................................................. 56
3.6.2
Program status word (PSW) ................................................................................................... 56
3.6.3
Using the RSS bit .................................................................................................................... 59
3.6.4
Stack pointer (SP) ................................................................................................................... 62
General-Purpose Registers................................................................................................66
3.7.1
Configuration ........................................................................................................................... 66
3.7.2
Functions.................................................................................................................................. 68
Special Function Registers (SFRs)...................................................................................71
Cautions................................................................................................................................75
3.7
3.8
3.9
CHAPTER 4
4.1
4.2
PORT FUNCTIONS.........................................................................................................76
Port Functions .....................................................................................................................76
Port Configuration...............................................................................................................78
4.2.1
Port 0........................................................................................................................................ 78
4.2.2
Port 1........................................................................................................................................ 79
4.2.3
Port 2........................................................................................................................................ 80
4.2.4
Port 4........................................................................................................................................ 83
4.2.5
Port 5........................................................................................................................................ 84
4.2.6
Port 6........................................................................................................................................ 88
4.2.7
Port 7........................................................................................................................................ 91
4.2.8
Port 8........................................................................................................................................ 92
4.2.9
Port 9........................................................................................................................................ 93
4.2.10
Port 10...................................................................................................................................... 94
Port Function Control Registers .......................................................................................95
Port Function Operations...................................................................................................98
4.4.1
Writing to I/O port .................................................................................................................... 98
4.4.2
Reading from I/O port.............................................................................................................. 98
4.4.3
Operations on I/O port............................................................................................................. 98
Selecting Mask Option........................................................................................................99
4.3
4.4
4.5
CHAPTER 5
5.1
5.2
5.3
5.4
CLOCK GENERATOR ................................................................................................. 100
Functions of Clock Generator ........................................................................................ 100
Configuration of Clock Generator ................................................................................. 100
Control Register ............................................................................................................... 102
Main System Clock Oscillator ........................................................................................ 106
5.4.1
Divider .................................................................................................................................... 108
Operations of Clock Generator ...................................................................................... 109
Changing CPU Clock Setting...........................................................................................110
5.5
5.6
CHAPTER 6
TIMER COUNTER OVERVIEW ....................................................................................111
CHAPTER 7
7.1
7.2
7.3
7.4
16-BIT TIMER/EVENT COUNTER ...............................................................................113
Function..............................................................................................................................113
Configuration .....................................................................................................................114
Control Register ................................................................................................................118
Operation ........................................................................................................................... 123
7.4.1 Operation as interval timer (16 bits) ........................................................................................ 123