Datasheet

PIC18F2420/2520/4420/4520
DS39631E-page 402 © 2008 Microchip Technology Inc.
RA4/T0CKI/C1OUT............................................... 13, 17
RA5/AN4/SS
/HLVDIN/C2OUT.............................. 13, 17
RB0/INT0/FLT0/AN12........................................... 14, 18
RB1/INT1/AN10 .................................................... 14, 18
RB2/INT2/AN8 ...................................................... 14, 18
RB3/AN9/CCP2 .................................................... 14, 18
RB4/KBI0/AN11 .................................................... 14, 18
RB5/KBI1/PGM ..................................................... 14, 18
RB6/KBI2/PGC ..................................................... 14, 18
RB7/KBI3/PGD ..................................................... 14, 18
RC0/T1OSO/T13CKI ............................................ 15, 19
RC1/T1OSI/CCP2................................................. 15, 19
RC2/CCP1 .................................................................. 15
RC2/CCP1/P1A .......................................................... 19
RC3/SCK/SCL ...................................................... 15, 19
RC4/SDI/SDA ....................................................... 15, 19
RC5/SDO .............................................................. 15, 19
RC6/TX/CK ........................................................... 15, 19
RC7/RX/DT ........................................................... 15, 19
RD0/PSP0................................................................... 20
RD1/PSP1................................................................... 20
RD2/PSP2................................................................... 20
RD3/PSP3................................................................... 20
RD4/PSP4................................................................... 20
RD5/PSP5/P1B........................................................... 20
RD6/PSP6/P1C...........................................................20
RD7/PSP7/P1D...........................................................20
RE0/RD
/AN5...............................................................21
RE1/WR
/AN6 .............................................................. 21
RE2/CS
/AN7...............................................................21
V
DD........................................................................ 15, 21
V
SS........................................................................ 15, 21
Pinout I/O Descriptions
PIC18F2420/2520....................................................... 12
PIC18F4420/4520....................................................... 16
PIR Registers ................................................................ 96–97
PLL Frequency Multiplier .................................................... 25
HSPLL Oscillator Mode...............................................25
Use with INTOSC........................................................25
POP...................................................................................296
POR.
See Power-on Reset.
PORTA
Associated Registers ................................................107
LATA Register...........................................................105
PORTA Register .......................................................105
TRISA Register ......................................................... 105
PORTB
Associated Registers ................................................110
LATB Register...........................................................108
PORTB Register .......................................................108
RB7:RB4 Interrupt-on-Change Flag
(RBIF Bit) .......................................................... 108
TRISB Register ......................................................... 108
PORTC
Associated Registers ................................................113
LATC Register .......................................................... 111
PORTC Register .......................................................111
RC3/SCK/SCL Pin .................................................... 175
TRISC Register......................................................... 111
PORTD
Associated Registers ................................................116
LATD Register .......................................................... 114
Parallel Slave Port (PSP) Function ...........................114
PORTD Register .......................................................114
TRISD Register......................................................... 114
PORTE
Associated Registers................................................ 119
LATE Register .......................................................... 117
PORTE Register....................................................... 117
PSP Mode Select (PSPMODE Bit)........................... 114
TRISE Register......................................................... 117
Power-Managed Modes...................................................... 33
and A/D Operation.................................................... 230
and EUSART Operation ........................................... 205
and Multiple Sleep Commands................................... 34
and PWM Operation ................................................. 159
and SPI Operation .................................................... 169
Clock Transitions and Status Indicators ..................... 34
Effects on Clock Sources............................................ 31
Entering ...................................................................... 33
Exiting Idle and Sleep Modes ..................................... 39
by Interrupt ......................................................... 39
by Reset ............................................................. 39
by WDT Time-out ............................................... 39
Without a Start-up Delay .................................... 40
Idle Modes .................................................................. 37
PRI_IDLE............................................................ 38
RC_IDLE ............................................................ 39
SEC_IDLE .......................................................... 38
Run Modes ................................................................. 34
PRI_RUN............................................................ 34
RC_RUN............................................................. 35
SEC_RUN .......................................................... 34
Selecting..................................................................... 33
Sleep Mode ................................................................ 37
Summary (table) ......................................................... 33
Power-on Reset (POR)....................................................... 43
Power-up Timer (PWRT) ............................................ 45
Time-out Sequence .................................................... 45
Power-up Delays ................................................................ 31
Power-up Timer (PWRT) .................................................... 31
Prescaler
Timer2 ...................................................................... 150
Prescaler, Timer0 ............................................................. 125
Prescaler, Timer2 ............................................................. 145
PRI_IDLE Mode.................................................................. 38
PRI_RUN Mode .................................................................. 34
Program Counter ................................................................ 54
PCL, PCH and PCU Registers ................................... 54
PCLATH and PCLATU Registers ............................... 54
Program Memory
and Extended Instruction Set ..................................... 72
Code Protection ........................................................ 264
Instructions ................................................................. 58
Two-Word ........................................................... 58
Interrupt Vector........................................................... 53
Look-up Tables ........................................................... 56
Map and Stack (diagram) ........................................... 53
Reset Vector............................................................... 53
Program Verification and Code Protection ....................... 263
Associated Registers................................................ 263
Programming, Device Instructions.................................... 267
PSP.
See Parallel Slave Port.
Pulse-Width Modulation.
See PWM (CCP Module)
and PWM (ECCP Module).
PUSH................................................................................ 296
PUSH and POP Instructions............................................... 55
PUSHL.............................................................................. 312