PIC18F2450_08 Datasheet, PDF (320/324 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2450/4450
Two-Speed Start-up ................................................. 191, 205
Two-Word Instructions
Example Cases .......................................................... 58
TXSTA Register
BRGH Bit ................................................................. 157
U
Universal Serial Bus ........................................................... 59
Address Register (UADDR) ..................................... 136
Associated Registers ............................................... 150
Buffer Descriptor Table ............................................ 137
Buffer Descriptors .................................................... 137
Address Validation ........................................... 140
Assignment in Different
Buffering Modes ....................................... 142
BDnSTAT Register (CPU Mode) ..................... 138
BDnSTAT Register (SIE Mode) ....................... 140
Byte Count ....................................................... 140
Example ........................................................... 137
Memory Map .................................................... 141
Ownership ........................................................ 137
Ping-Pong Buffering ......................................... 141
Register Summary ........................................... 142
Status and Configuration ................................. 137
Class Specifications and Drivers ............................. 152
Descriptors ............................................................... 152
Endpoint Control ...................................................... 135
Enumeration ............................................................. 152
External Transceiver ................................................ 131
Eye Pattern Test Enable .......................................... 133
Firmware and Drivers ............................................... 150
Frame Number Registers ......................................... 136
Frames ..................................................................... 151
Internal Transceiver ................................................. 131
Internal Voltage Regulator ....................................... 133
Interrupts .................................................................. 143
and USB Transactions ..................................... 143
Layered Framework ................................................. 151
Oscillator Requirements .......................................... 150
Output Enable Monitor ............................................. 133
Overview .......................................................... 129, 151
Ping-Pong Buffer Configuration ............................... 133
Power ...................................................................... 151
Power Modes ........................................................... 149
Bus Power Only ............................................... 149
Dual Power with Self-Power
Dominance .............................................. 149
Self-Power Only ............................................... 149
Pull-up Resistors ...................................................... 133
RAM ......................................................................... 136
Memory Map .................................................... 136
Speed ...................................................................... 152
Status and Control ................................................... 130
Status Register (USTAT) ......................................... 134
Transfer Types ......................................................... 151
UFRMH:UFRML Registers ...................................... 136
USB
Internal Voltage Regulator Specifications ................ 281
Module Specifications .............................................. 281
USB. See Universal Serial Bus.
W
Watchdog Timer (WDT) ........................................... 191, 203
Associated Registers ............................................... 204
Control Register ....................................................... 203
During Oscillator Failure .......................................... 206
Programming Considerations .................................. 203
WWW Address ................................................................ 319
WWW, On-Line Support ...................................................... 6
X
XORLW ............................................................................ 253
XORWF ........................................................................... 254
DS39760D-page 318
© 2008 Microchip Technology Inc.