pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 11

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

Revision 1.2
Table of Contents
4.8
4.9
4.10
4.11
PULSE WIDTH MODULATOR (PWM) .................................................................................... 143
4.8.1
4.8.2
4.8.3
4.8.4
4.8.5
UNIVERSAL SYNCHRONOUS/ASYNCHRONOUS RECEIVER-TRANSMITTER (USART) .. 147
4.9.1
4.9.2
4.9.3
4.9.4
4.9.5
TIMER AND WATCHDOG (TWD) ........................................................................................... 160
4.10.1
4.10.2
4.10.3
4.10.4
ANALOG TO DIGITAL CONVERTER (ADC) .......................................................................... 166
4.11.1
Features .................................................................................................................... 143
Functional Description ............................................................................................... 143
Cycle Time and Duty Cycle Calculation .................................................................... 144
Power Modes ............................................................................................................. 144
PWM Registers .......................................................................................................... 144
Features .................................................................................................................... 147
Functional Overview .................................................................................................. 147
Operation ................................................................................................................... 148
USART Registers ...................................................................................................... 154
Usage Hints ............................................................................................................... 159
Features .................................................................................................................... 160
Functional Description ............................................................................................... 161
TWD Registers .......................................................................................................... 162
Usage Hints ............................................................................................................... 165
Features .................................................................................................................... 166
(Continued)
Timer/Counter Register 1 (TnCNT1) .................................................................... 138
Reload/Capture Register A (TnCRA) ................................................................... 138
Reload/Capture Register B (TnCRB) ................................................................... 138
Timer/Counter Register 2 (TnCNT2) .................................................................... 138
Clock Pre-Scaler Register (TnPRSC) .................................................................. 139
Clock Unit Control Register (TnCKC) ................................................................... 139
Timer Mode Control Register (TnCTRL) .............................................................. 140
Timer Interrupt Control Register (TnICTL) ........................................................... 141
Timer Interrupt Clear Register (TnICLR) .............................................................. 142
PWM Register Map .............................................................................................. 144
Clock Pre-Scaler Register (PRSC) ....................................................................... 144
Cycle Time Register (CTR) .................................................................................. 145
Duty Cycle Registers 0 to 7 (DCRi) ...................................................................... 145
PWM Polarity Register (PWMPOL) ...................................................................... 146
PWM Control Register (PWMCNT) ...................................................................... 146
USART Register Map ........................................................................................... 154
Receive Data Buffer Register (UnRBUF) ............................................................. 154
Transmit Data Buffer Register (UnTBUF) ............................................................ 154
Baud Rate Pre-Scaler Register (UnPSR) ............................................................. 154
Baud Rate Divisor Register (UnBAUD) ................................................................ 155
Frame Select Register (UnFRS) .......................................................................... 155
Mode Select Register (UnMDSL) ......................................................................... 156
Status Register (UnSTAT) .................................................................................... 157
Interrupt Control Register (UnICTRL) ................................................................... 158
TWD Register Map ............................................................................................... 162
Timer and Watchdog Configuration Register (TWCFG) ....................................... 162
Timer and Watchdog Clock Pre-Scaler Register (TWCP) .................................... 163
TWD Timer 0 Register (TWDT0) .......................................................................... 164
TWDT0 Control and Status Register (T0CSR) ..................................................... 164
Watchdog Count Register (WDCNT) ................................................................... 165
Watchdog Service Data Match Register (WDSDM) ............................................. 165
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