PC87570 datasheet(11/168 Pages) NSC

11 / 168 page

Table of Contents

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14.3.4

Slow Speed Clock ..................................................................................................... 107

14.3.5

Counter Clock Source Select .................................................................................... 108

14.4

TIMER/COUNTER AND ACTION UNIT .................................................................................. 108

14.4.1

Operation Modes ....................................................................................................... 108

14.4.2

Timer Interrupts ......................................................................................................... 113

14.4.3

Timer I/O Functions ................................................................................................... 113

14.5

MFT16 REGISTERS ................................................................................................................ 114

14.5.1

Clock Prescaler Register (TPRSC) ........................................................................... 114

14.5.2

Clock Unit Control Register (TCKC) .......................................................................... 114

14.5.3

Timer/Counter Register 1 (TCNT1) ........................................................................... 114

14.5.4

Timer/Counter Register 2 (TCNT2) ........................................................................... 114

14.5.5

Reload/Capture Register A(TCRA) ........................................................................... 114

14.5.6

Reload/Capture Register B (TCRB) .......................................................................... 114

14.5.7

Timer Mode Control Register (TCTRL) ..................................................................... 114

14.5.8

Timer Interrupt Control Register (TICTL) ................................................................... 115

14.5.9

Timer Interrupt Clear Register (TICLR) ..................................................................... 115

15.0

Timer and WATCHDOG (TWD)

15.1

FEATURES .............................................................................................................................. 116

15.2

FUNCTIONAL DESCRIPTION ................................................................................................ 116

15.2.1

Input Clock ................................................................................................................. 116

15.2.2

Pre-Scale ................................................................................................................... 116

15.2.3

TWD Timer 0 ............................................................................................................. 116

15.3

WATCHDOG OPERATION .................................................................................................... 117

15.4

TWD CONTROL AND CONFIGURATION .............................................................................. 117

15.5

OPERATION IN IDLE MODE .................................................................................................. 117

15.6

TWD REGISTERS ................................................................................................................... 117

15.6.1

Timer and WATCHDOG Configuration Registers (TWCFG) ..................................... 117

15.6.2

Timer and Watchdog Clock Pre-Scaler Register (TWCP) ......................................... 117

15.6.3

TWD Timer 0 Register (TWDT0) ............................................................................... 118

15.6.4

TWDT0 Control and Status Register (T0CSR) .......................................................... 118

15.6.5

WATCHDOG Count Register (WDCNT) ................................................................... 118

15.6.6

WATCHDOG Service Data Match Register (WDSDM) ............................................. 118

15.7

USAGE HINTS ........................................................................................................................ 118

16.0

Analog to Digital Converter (ADC)

16.1

FEATURES .............................................................................................................................. 119

16.2

FUNCTIONAL DESCRIPTION ................................................................................................ 119

16.2.1

Reset ......................................................................................................................... 120

16.2.2

Reference Voltage ..................................................................................................... 120

16.2.3

Input Signal Range .................................................................................................... 120

16.2.4

ADC Clock ................................................................................................................. 120

16.2.5

Initializing and Enabling the ADC .............................................................................. 120

16.2.6

ADC Operation .......................................................................................................... 121

16.2.7

Disabling the ADC to Save Power ............................................................................. 121

PC87570 Datasheet(PDF) 11 Page - National Semiconductor (TI)

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