pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 11

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

Revision 1.07
Table of Contents
4.8
4.9
4.10
4.11
PULSE WIDTH MODULATOR (PWM) .................................................................................... 147
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
UNIVERSAL SYNCHRONOUS/ASYNCHRONOUS RECEIVER-TRANSMITTER (USART) .. 151
4.9.1
4.9.2
4.9.3
4.9.4
4.9.5
TIMER AND WATCHDOG (TWD) ........................................................................................... 164
4.10.1
4.10.2
4.10.3
4.10.4
ANALOG TO DIGITAL CONVERTER (ADC) .......................................................................... 170
4.11.1
4.11.2
4.11.3
4.11.4
4.11.5
Features .................................................................................................................... 147
Functional Description ............................................................................................... 147
Cycle Time and Duty Cycle Calculation .................................................................... 148
Power Modes ............................................................................................................. 148
PWM Registers .......................................................................................................... 148
Features .................................................................................................................... 151
Functional Overview .................................................................................................. 151
Operation ................................................................................................................... 153
USART Registers ...................................................................................................... 158
Usage Hints ............................................................................................................... 162
Features .................................................................................................................... 164
Functional Description ............................................................................................... 164
TWD Registers .......................................................................................................... 166
Usage Hints ............................................................................................................... 169
Features .................................................................................................................... 170
Functional Description ............................................................................................... 170
Voltage Measurement ............................................................................................... 173
Temperature Measurement ....................................................................................... 173
ADC Operation .......................................................................................................... 174
(Continued)
Timer Interrupt Control Register (TnICTL) ......................................................... 145
Timer Interrupt Clear Register (TnICLR) ........................................................... 146
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
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
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
Reset ................................................................................................................. 174
ADC Clock ......................................................................................................... 174
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