Datasheet

PIC18F2455/2550/4455/4550
DS39632E-page 424 © 2009 Microchip Technology Inc.
C
C Compilers
MPLAB C18 ............................................................. 364
MPLAB C30 ............................................................. 364
CALL ................................................................................328
CALLW .............................................................................357
Capture (CCP Module) ..................................................... 145
CCP Pin Configuration ............................................. 145
CCPRxH:CCPRxL Registers ................................... 145
Prescaler ..................................................................145
Software Interrupt .................................................... 145
Timer1/Timer3 Mode Selection ................................ 145
Capture (ECCP Module) .................................................. 152
Capture/Compare (CCP Module)
Associated Registers ...............................................147
Capture/Compare/PWM (CCP) ........................................143
Capture Mode. See Capture.
CCP Mode and Timer Resources ............................ 144
CCP2 Pin Assignment ............................................. 144
CCPRxH Register .................................................... 144
CCPRxL Register ..................................................... 144
Compare Mode. See Compare.
Interaction of Two CCP Modules for
Timer Resources .............................................. 144
Module Configuration ............................................... 144
Clock Sources .................................................................... 32
Effects of Power-Managed Modes ............................. 34
Selecting the 31 kHz Source ......................................32
Selection Using OSCCON Register ........................... 32
CLRF ................................................................................329
CLRWDT ..........................................................................329
Code Examples
16 x 16 Signed Multiply Routine ................................ 98
16 x 16 Unsigned Multiply Routine ............................ 98
8 x 8 Signed Multiply Routine .................................... 97
8 x 8 Unsigned Multiply Routine ................................ 97
Changing Between Capture Prescalers ................... 145
Computed GOTO Using an Offset Value ................... 62
Data EEPROM Read .................................................93
Data EEPROM Refresh Routine ................................94
Data EEPROM Write .................................................93
Erasing a Flash Program Memory Row .....................86
Executing Back to Back SLEEP Instructions .............36
Fast Register Stack .................................................... 62
How to Clear RAM (Bank 1) Using
Indirect Addressing ............................................ 74
Implementing a Real-Time Clock Using
a Timer1 Interrupt Service ...............................135
Initializing PORTA ....................................................113
Initializing PORTB ....................................................116
Initializing PORTC .................................................... 119
Initializing PORTD .................................................... 122
Initializing PORTE ....................................................125
Loading the SSPBUF (SSPSR) Register ................. 200
Reading a Flash Program Memory Word .................. 85
Saving STATUS, WREG and BSR
Registers in RAM ............................................. 111
Writing to Flash Program Memory ....................... 88–89
Code Protection ............................................................... 291
COMF ............................................................................... 330
Comparator ...................................................................... 275
Analog Input Connection Considerations ................. 279
Associated Registers ...............................................279
Configuration ............................................................ 276
Effects of a Reset ..................................................... 278
Interrupts ................................................................. 278
Operation ................................................................. 277
Operation During Sleep ........................................... 278
Outputs .................................................................... 277
Reference ................................................................ 277
External Signal ................................................ 277
Internal Signal .................................................. 277
Response Time ........................................................ 277
Comparator Specifications ............................................... 382
Comparator Voltage Reference ....................................... 281
Accuracy and Error .................................................. 282
Associated Registers ............................................... 283
Configuring .............................................................. 281
Connection Considerations ...................................... 282
Effects of a Reset .................................................... 282
Operation During Sleep ........................................... 282
Compare (CCP Module) .................................................. 146
CCP Pin Configuration ............................................. 146
CCPRx Register ...................................................... 146
Software Interrupt .................................................... 146
Special Event Trigger .............................. 141, 146, 274
Timer1/Timer3 Mode Selection ................................ 146
Compare (ECCP Module) ................................................ 152
Special Event Trigger .............................................. 152
Configuration Bits ............................................................ 292
Configuration Register Protection .................................... 311
Context Saving During Interrupts ..................................... 111
Conversion Considerations .............................................. 420
CPFSEQ .......................................................................... 330
CPFSGT .......................................................................... 331
CPFSLT ........................................................................... 331
Crystal Oscillator/Ceramic Resonator ................................ 25
Customer Change Notification Service ............................ 433
Customer Notification Service ......................................... 433
Customer Support ............................................................ 433
D
Data Addressing Modes .................................................... 74
Comparing Addressing Modes with the
Extended Instruction Set Enabled ..................... 78
Direct ......................................................................... 74
Indexed Literal Offset ................................................ 77
Indirect ....................................................................... 74
Inherent and Literal .................................................... 74
Data EEPROM
Code Protection ....................................................... 311
Data EEPROM Memory ..................................................... 91
Associated Registers ................................................. 95
EECON1 and EECON2 Registers ............................. 91
Operation During Code-Protect ................................. 94
Protection Against Spurious Write ............................. 94
Reading ..................................................................... 93
Using ......................................................................... 94
Write Verify ................................................................ 93
Writing ....................................................................... 93
Data Memory ..................................................................... 65
Access Bank .............................................................. 67
and the Extended Instruction Set .............................. 77
Bank Select Register (BSR) ...................................... 65
General Purpose Registers ....................................... 67
Map for PIC18F2455/2550/4455/4550 Devices ......... 66
Special Function Registers ........................................ 68
Map .................................................................... 68
USB RAM .................................................................. 65
DAW ................................................................................ 332