Datasheet

PIC18F2420/2520/4420/4520
DS39631B-page 380 Preliminary © 2007 Microchip Technology Inc.
Pin Functions
MCLR
/VPP/RE3 ....................................................12, 16
OSC1/CLKI/RA7 ..................................................12, 16
OSC2/CLKO/RA6 ................................................12, 16
RA0/AN0 ..............................................................13, 17
RA1/AN1 ..............................................................13, 17
RA2/AN2/V
REF-/CVREF ........................................13, 17
RA3/AN3/V
REF+ ...................................................13, 17
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
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
PRO MATE II Universal Device Programmer .................. 319
Program Counter ............................................................... 54
PCL, PCH and PCU Registers .................................. 54
PCLATH and PCLATU Registers .............................. 54