PIC18F2450_08 Datasheet, PDF (317/324 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

Pin Functions
MCLR/VPP/RE3 .................................................... 12, 16
NC/ICCK/ICPGC ........................................................ 21
NC/ICDT/ICPGD ........................................................ 21
NC/ICPORTS ............................................................. 21
NC/ICRST/ICVPP ....................................................... 21
OSC1/CLKI .......................................................... 12, 16
OSC2/CLKO/RA6 ................................................ 12, 16
RA0/AN0 .............................................................. 13, 17
RA1/AN1 .............................................................. 13, 17
RA2/AN2/VREF- .................................................... 13, 17
RA3/AN3/VREF+ ................................................... 13, 17
RA4/T0CKI/RCV .................................................. 13, 17
RA5/AN4/HLVDIN ................................................ 13, 17
RB0/AN12/INT0 ................................................... 14, 18
RB1/AN10/INT1 ................................................... 14, 18
RB2/AN8/INT2/VMO ............................................ 14, 18
RB3/AN9/VPO ..................................................... 14, 18
RB4/AN11/KBI0 ................................................... 14, 18
RB5/KBI1/PGM .................................................... 14, 18
RB6/KBI2/PGC .................................................... 14, 18
RB7/KBI3/PGD .................................................... 14, 18
RC0/T1OSO/T1CKI ............................................. 15, 19
RC1/T1OSI/UOE .................................................. 15, 19
RC2/CCP1 ........................................................... 15, 19
RC4/D-/VM ........................................................... 15, 19
RC5/D+/VP .......................................................... 15, 19
RC6/TX/CK .......................................................... 15, 19
RC7/RX/DT .......................................................... 15, 19
RD0 ............................................................................ 20
RD1 ............................................................................ 20
RD2 ............................................................................ 20
RD3 ............................................................................ 20
RD4 ............................................................................ 20
RD5 ............................................................................ 20
RD6 ............................................................................ 20
RD7 ............................................................................ 20
RE0/AN5 .................................................................... 21
RE1/AN6 .................................................................... 21
RE2/AN7 .................................................................... 21
VDD ...................................................................... 15, 21
VSS ....................................................................... 15, 21
VUSB ..................................................................... 15, 21
Pinout I/O Descriptions
PIC18F2450 ............................................................... 12
PIC18F4450 ............................................................... 16
PIR Registers ..................................................................... 90
PLL Frequency Multiplier ................................................... 26
HSPLL, XTPLL, ECPLL and
ECPIO Oscillator Modes .................................... 26
PLL Lock Time-out ............................................................. 45
POP ................................................................................. 242
POR. See Power-on Reset.
PORTA
Associated Registers ............................................... 100
I/O Summary ............................................................ 100
LATA Register ............................................................ 99
PORTA Register ........................................................ 99
TRISA Register .......................................................... 99
PIC18F2450/4450
PORTB
Associated Registers ............................................... 103
I/O Summary ........................................................... 102
LATB Register ......................................................... 101
PORTB Register ...................................................... 101
RB7:RB4 Interrupt-on-Change Flag
(RBIF Bit) ......................................................... 101
TRISB Register ........................................................ 101
PORTC
Associated Registers ............................................... 106
I/O Summary ........................................................... 105
LATC Register ......................................................... 104
PORTC Register ...................................................... 104
TRISC Register ....................................................... 104
PORTD
Associated Registers ............................................... 108
I/O Summary ........................................................... 108
LATD Register ......................................................... 107
PORTD Register ...................................................... 107
TRISD Register ....................................................... 107
PORTE
Associated Registers ............................................... 110
I/O Summary ........................................................... 110
LATE Register ......................................................... 109
PORTE Register ...................................................... 109
TRISE Register ........................................................ 109
Postscaler, WDT
Assignment (PSA Bit) .............................................. 113
Rate Select (T0PS2:T0PS0 Bits) ............................. 113
Power-Managed Modes ..................................................... 33
and A/D Operation ................................................... 182
Clock Sources ........................................................... 33
Clock Transitions and Status Indicators .................... 34
Effects on Various Clock Sources ............................. 32
Entering ..................................................................... 33
Exiting Idle and Sleep Modes .................................... 39
by Interrupt ........................................................ 39
by Reset ............................................................ 39
by WDT Time-out .............................................. 39
Without an Oscillator Start-up Delay ................. 40
Idle ............................................................................. 37
Idle Modes
PRI_IDLE .......................................................... 38
RC_IDLE ........................................................... 39
SEC_IDLE ......................................................... 38
Multiple Sleep Commands ......................................... 34
Run Modes ................................................................ 34
PRI_RUN ........................................................... 34
RC_RUN ............................................................ 36
SEC_RUN ......................................................... 34
Selecting .................................................................... 33
Sleep ......................................................................... 37
Summary (table) ........................................................ 33
Power-on Reset (POR) ...................................................... 43
Power-up Delays ............................................................... 32
Power-up Timer (PWRT) ............................................. 32, 45
Prescaler, Timer0 ............................................................ 113
Assignment (PSA Bit) .............................................. 113
Rate Select (T0PS2:T0PS0 Bits) ............................. 113
Prescaler, Timer2 ............................................................ 128
© 2008 Microchip Technology Inc.
DS39760D-page 315