PC87591L datasheet(11/437 Pages) NSC

11 / 437 page

Table of Contents (Continued)

Revision 1.07

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Timer Interrupt Control Register (TnICTL) ......................................................... 145

Timer Interrupt Clear Register (TnICLR) ........................................................... 146

4.8

PULSE WIDTH MODULATOR (PWM) .................................................................................... 147

4.8.1

Features .................................................................................................................... 147

4.8.2

Functional Description ............................................................................................... 147

4.8.3

Cycle Time and Duty Cycle Calculation .................................................................... 148

4.8.4

Power Modes ............................................................................................................. 148

4.8.5

PWM Registers .......................................................................................................... 148

PWM Register Map ............................................................................................ 148

Clock Pre-Scaler Register (PRSC) .................................................................... 148

Cycle Time Register (CTR) ................................................................................ 149

Duty Cycle Registers 0 to 7 (DCRi) ................................................................... 149

PWM Polarity Register (PWMPOL) ................................................................... 150

PWM Control Register (PWMCNT) ................................................................... 150

4.9

UNIVERSAL SYNCHRONOUS/ASYNCHRONOUS RECEIVER-TRANSMITTER (USART) .. 151

4.9.1

Features .................................................................................................................... 151

4.9.2

Functional Overview .................................................................................................. 151

4.9.3

Operation ................................................................................................................... 153

4.9.4

USART Registers ...................................................................................................... 158

USART Register Map ........................................................................................ 158

Receive Data Buffer Register (URBUF) ............................................................ 158

Transmit Data Buffer Register (UTBUF) ............................................................ 158

Baud Rate Pre-Scaler Register (UPSR) ............................................................ 158

Baud Rate Divisor Register (UBAUD) ............................................................... 158

Frame Select Register (UFRS) .......................................................................... 159

Mode Select Register (UMDSL) ........................................................................ 160

Status Register (USTAT) ................................................................................... 161

Interrupt Control Register (UICTRL) .................................................................. 162

4.9.5

Usage Hints ............................................................................................................... 162

4.10

TIMER AND WATCHDOG (TWD) ........................................................................................... 164

4.10.1

Features .................................................................................................................... 164

4.10.2

Functional Description ............................................................................................... 164

4.10.3

TWD Registers .......................................................................................................... 166

TWD Register Map ............................................................................................ 166

Timer and WATCHDOG Configuration Register (TWCFG) ............................... 166

Timer and WATCHDOG Clock Pre-Scaler Register (TWCP) ............................ 167

TWD Timer 0 Register (TWDT0) ....................................................................... 167

TWDT0 Control and Status Register (T0CSR) .................................................. 168

WATCHDOG Count Register (WDCNT) ............................................................ 168

WATCHDOG Service Data Match Register (WDSDM) ..................................... 168

4.10.4

Usage Hints ............................................................................................................... 169

4.11

ANALOG TO DIGITAL CONVERTER (ADC) .......................................................................... 170

4.11.1

Features .................................................................................................................... 170

4.11.2

Functional Description ............................................................................................... 170

4.11.3

Voltage Measurement ............................................................................................... 173

4.11.4

Temperature Measurement ....................................................................................... 173

4.11.5

ADC Operation .......................................................................................................... 174

Reset ................................................................................................................. 174

ADC Clock ......................................................................................................... 174

PC87591L Datasheet(PDF) 11 Page - National Semiconductor (TI)

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