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11.6 COMPARISON JUDGEMENTS .............................................................................................................. 96
11.6.1
“Equal to” Judgement ................................................................................................................ 96
11.6.2
“Not Equal to” Judgement ......................................................................................................... 97
11.6.3
“Greater Than or Equal to” Judgement .................................................................................... 97
11.6.4
“Less Than” Judgement ............................................................................................................ 98
11.7 ROTATIONS ............................................................................................................................................. 99
11.7.1
Rotation to the Right ................................................................................................................. 99
11.7.2
Rotation to the Left .................................................................................................................. 100
CHAPTER 12 PORTS ......................................................................................................................... 101
12.1 PORT 0A (P0A
0
, P0A
1
, P0A
2
, P0A
3
).................................................................................................... 101
12.2 PORT 0B (P0B
0
, P0B
1
, P0B
2
, P0B
3
).................................................................................................... 102
12.3 PORT 0C (P0C
0
/ADC
0
, P0C
1
/ADC
1
, P0C
2
/ADC
2
, P0C
3
/ADC
3
) .......................................................... 103
12.4 PORT 0D (P0D
0
/SCK, P0D
1
/SO, P0D
2
/SI, P0D
3
/TM0OUT)................................................................ 104
12.5 PORT 1A (P1A
0
, P1A
1
, P1A
2
, P1A
3
).................................................................................................... 105
12.6 PORT 1B (P1B
0
).................................................................................................................................... 105
12.7 PORT CONTROL REGISTER............................................................................................................... 106
12.7.1
Input/Output Switching by Group I/O...................................................................................... 106
12.7.2
Input/Output Switching by Bit I/O ........................................................................................... 107
12.7.3
Specifying Pull-Up Resistor Incorporation Using Software ................................................... 109
CHAPTER 13 PERIPHERAL HARDWARE ......................................................................................... 111
13.1 8-BIT TIMERS/COUNTERS (TM0 and TM1) ........................................................................................111
13.1.1
8-Bit Timers/Counters Configuration .......................................................................................111
13.1.2
Operation of 8-Bit Timers/Counters ........................................................................................ 115
13.1.3
Selecting Count Pulse ............................................................................................................. 115
13.1.4
Setting Count Value to Modulo Register ................................................................................ 116
13.1.5
Reading Value of Count Register ........................................................................................... 117
13.1.6
Setting of Interval Time ........................................................................................................... 118
13.1.7
Error of Interval Time............................................................................................................... 119
13.1.8
Timer 0 Output......................................................................................................................... 121
13.2 BASIC INTERVAL TIMER (BTM) ......................................................................................................... 122
13.2.1
Basic Interval Timer Configuration.......................................................................................... 122
13.2.2
Registers Controlling Basic Interval Timer ............................................................................. 123
13.2.3
Operation of Basic Interval Timer ........................................................................................... 124
13.2.4
Watchdog Timer Function ....................................................................................................... 125
13.3 A/D CONVERTER ................................................................................................................................. 128
13.3.1
A/D Converter Configuration................................................................................................... 128
13.3.2
Functions of A/D Converter..................................................................................................... 129
13.3.3
Setting Values in the 8-bit Data Register (ADCR) ................................................................. 132
13.3.4
Reading Values from the 8-bit Data Register (ADCR) .......................................................... 133
13.3.5
A/D Converter Operation......................................................................................................... 134
13.4 SERIAL INTERFACE (SIO) .................................................................................................................. 141
13.4.1
Functions of the Serial Interface............................................................................................. 141
13.4.2
3-wire Serial Interface Operation Modes................................................................................ 143
13.4.3
Setting Values in the Shift Register ........................................................................................ 147
13.4.4
Reading Values from the Shift Register ................................................................................. 148