PIC18F2450 Datasheet, PDF (316/320 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2450/4450
U
Universal Serial Bus ........................................................... 59
Address Register (UADDR) ..................................... 136
Associated Registers ............................................... 149
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 ............................. 151
Descriptors ............................................................... 151
Endpoint Control ...................................................... 135
Enumeration ............................................................. 151
External Transceiver ................................................ 131
Eye Pattern Test Enable .......................................... 133
Firmware and Drivers ............................................... 148
Frame Number Registers ......................................... 136
Frames ..................................................................... 150
Internal Transceiver ................................................. 131
Internal Voltage Regulator ....................................... 133
Interrupts .................................................................. 143
and USB Transactions ..................................... 143
Layered Framework ................................................. 150
Oscillator Requirements ........................................... 148
Output Enable Monitor ............................................. 133
Overview .......................................................... 129, 150
Ping-Pong Buffer Configuration ............................... 133
Power ....................................................................... 150
Power Modes ........................................................... 148
Bus Power Only ............................................... 148
Dual Power with Self-Power
Dominance ............................................... 148
Self-Power Only ............................................... 148
Pull-up Resistors ...................................................... 133
RAM ......................................................................... 136
Memory Map .................................................... 136
Speed ....................................................................... 151
Status and Control ................................................... 130
Transfer Types ......................................................... 150
UFRMH:UFRML Registers ...................................... 136
USB
Internal Voltage Regulator Specifications ................ 279
Module Specifications .............................................. 279
USB. See Universal Serial Bus.
W
Watchdog Timer (WDT) ........................................... 189, 201
Associated Registers ............................................... 202
Control Register ....................................................... 201
During Oscillator Failure .......................................... 204
Programming Considerations .................................. 201
WWW Address ................................................................ 315
WWW, On-Line Support ...................................................... 6
X
XORLW ............................................................................ 251
XORWF ........................................................................... 252
DS39760A-page 314
Advance Information
© 2006 Microchip Technology Inc.