PIC18FXX8 Datasheet, PDF (10/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
FIGURE 1-1:
PIC18F248/258 BLOCK DIAGRAM
Data Bus<8>
21
Address Latch
Program Memory
up to 32 Kbytes
Data Latch
21 ^{Table Pointer<21>}
inc/dec logic
88
21
PCLATU PCLATH
PCU PCH PCL
Program Counter
31 Level Stack
Data Latch
Data RAM
up to 1536 bytes
Address Latch
12
Address<12>
4
BSR
12
FSR0
FSR1
FSR2
4
Bank0, F
12
Table Latch
16
8
ROM Latch
Decode
inc/dec
logic
OSC2/CLKO/RA6
OSC1/CLKI
T1OSI
T1OSO
Instruction
Decode &
Control
Timing
Generation
4X PLL
Precision
Band Gap
Reference
Band Gap
IR
8
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
Test Mode
Select
PRODH PRODL
3
BITOP
8
8 x 8 Multiply
8
W
8
8
8
ALU<8>
8
MCLR VDD, VSS
PBOR
PLVD
Timer0
Timer1
Timer2
Timer3
10-bit
ADC
PORTA
PORTB
PORTC
RA0/AN0/CVREF
RA1/AN1
RA2/AN2/VREF-
RA3/AN3/VREF+
RA4/T0CKI
RA5/AN4/SS/LVDIN
OSC2/CLKO/RA6
RB0/INT0
RB1/INT1
RB2/CANTX/INT2
RB3/CANRX
RB4
RB5/PGM
RB6/PGC
RB7/PGD
RC0/T1OSO/T1CKI
RC1/T1OSI
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
Data EEPROM
CCP1
USART
Synchronous
Serial Port
CAN Module
DS41159D-page 8
 2004 Microchip Technology Inc.