ADP315PC87570 National Semiconductor, ADP315PC87570 Datasheet - Page 12

• Manufacturer Part Number: ADP315PC87570
• Description: Keyboard and Power Management Controller
• Manufacturer: National Semiconductor

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17.0
18.0
16.3
16.4
16.5
Digital to Analog Converter (DAC)
17.1
17.2
17.3
17.4
Development System Support
18.1
18.2
18.3
16.2.8
16.2.9
16.2.10 Interrupt Driven Operation ......................................................................................... 121
16.2.11 Overflow .................................................................................................................... 121
OPERATION MODES ............................................................................................................. 122
ADC REGISTERS ................................................................................................................... 123
16.4.1
16.4.2
16.4.3
16.4.4
16.4.5
USAGE HINTS ........................................................................................................................ 125
16.5.1
16.5.2
16.5.3
16.5.4
16.5.5
FEATURES .............................................................................................................................. 127
FUNCTIONAL DESCRIPTION ................................................................................................ 127
17.2.1
17.2.2
17.2.3
17.2.4
17.2.5
17.2.6
DAC REGISTERS ................................................................................................................... 128
17.3.1
17.3.2
USAGE HINTS ........................................................................................................................ 128
17.4.1
17.4.2
17.4.3
17.4.4
17.4.5
17.4.6
ISE INTERRUPT ..................................................................................................................... 130
TRIS STRAP INPUT PIN ......................................................................................................... 130
FREEZING EVENTS ............................................................................................................... 130
18.3.1
18.3.2
18.3.3
18.3.4
Sampling Time ........................................................................................................... 121
Polling Driven Operation ............................................................................................ 121
ADC Status Register (ADCST) .................................................................................. 123
ADC Control Register 1 (ADCCNT1) ......................................................................... 123
ADC Control Register 2 (ADCCNT2) ......................................................................... 123
ADC Control Register 3 (ADCCNT3) ......................................................................... 124
ADC Data Registers .................................................................................................. 125
Power Supply and Layout Guidelines ........................................................................ 125
Power Consumption .................................................................................................. 125
Filtering the Noise on Input Signals ........................................................................... 126
AD0-7 Multiplexing with PD0-7 Port .......................................................................... 126
Calculating the Sampling Time .................................................................................. 126
DAC Reset ................................................................................................................. 127
Reference Voltage ..................................................................................................... 127
Output Signal Range ................................................................................................. 127
Initializing and Enabling the DAC .............................................................................. 128
Disabling the DAC ..................................................................................................... 128
Conversion Start ........................................................................................................ 128
DAC Control Register (DACCTRL) ............................................................................ 128
DAC Data Registers .................................................................................................. 128
Power Supply and Layout Guidelines ........................................................................ 128
Output Settling Time .................................................................................................. 129
Output Voltage Accuracy ........................................................................................... 129
Filtering Noise on Output Signals .............................................................................. 129
Current Consumption ................................................................................................ 129
Entering Idle Mode .................................................................................................... 129
Disabling Maskable Interrupts ................................................................................... 130
Freezing the WATCHDOG Counter .......................................................................... 130
Disabling Additional Modules .................................................................................... 130
Disabling Destructive Reads ..................................................................................... 130
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