PIC18F6520-I Datasheet, PDF (12/380 Pages) Micrel Semiconductor – 64/80-Pin High-Performance, 256 Kbit to 1 Mbit Enhanced Flash Microcontrollers with A/D

PIC18F6520/8520/6620/8620/6720/8720
FIGURE 1-2:
PIC18F8X20 BLOCK DIAGRAM
Data Bus<8>
21
Address Latch
Program Memory
Data Latch
21 ^{Table Pointer<21>}
8
8
inc/dec logic
21
PCLATU PCLATH
PCU PCH PCL
Program Counter
31 Level Stack
Data Latch
Data RAM
Address Latch
12
Address<12>
4
BSR
12
FSR0
FSR1
FSR2
4
Bank0, F
12
Table Latch
16
8
ROM Latch
inc/dec
Decode _logic
AD15:AD0, A19:A16⁽¹⁾
IR
Instruction
Decode &
Control
OSC2/CLKO
OSC1/CLKI
Timing
Generation
Precision
Band Gap
Reference
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset
8
PRODH PRODL
3
BITOP
8
8 x 8 Multiply
8
WREG
8
8
8
ALU<8>
8
MCLR/VPP VDD, VSS
Synchronous
Serial Port
USART1
USART2
Data
EEPROM
BOR
LVD
Timer0
Timer1
Timer2
Timer3
Timer4
PORTA
PORTB
PORTC
PORTD
PORTE
PORTF
PORTG
PORTH
PORTJ
RA0/AN0
RA1/AN1
RA2/AN2/VREF-
RA3/AN3/VREF+
RA4/T0CKI
RA5/AN4/LVDIN
RA6
RB0/INT0
RB1/INT1
RB2/INT2
RB3/INT3/CCP2
RB4/KBI0
RB5/KBI1/PGM
RB6/KBI2/PGC
RB7/KBI3/PGD
RC0/T1OSO/T13CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX1/CK1
RC7/RX1/DT1
RD7/PSP7/AD7:
RD0/PSP0/AD0
RE0/RD/AD8
RE1/WR/AD9
RE2/CS/AD10
RE3/AD11
RE4/AD12
RE5/AD13
RE6/AD14
RE7/CCP2/AD15
RF0/AN5
RF1/AN6/C2OUT
RF2/AN7/C1OUT
RF3/AN8
RF4/AN9
RF5/AN10/CVREF
RF6/AN11
RF7/SS
RG0/CCP3
RG1/TX2/CK2
RG2/RX2/DT2
RG3/CCP4
RG4/CCP5
RH3/AD19:RH0/AD16
RH7/AN15:RH4/AN12
RJ0/ALE
RJ1/OE
RJ2/WRL
RJ3/WRH
RJ4/BA0
RJ5/CE
RJ6/LB
RJ7/UB
Comparator CCP1
CCP2
CCP3
CCP4
CCP5
10-bit
A/D
Note 1: External memory interface pins are physically multiplexed with PORTD (AD7:AD0), PORTE (AD15:AD8) and PORTH (A19:A16).
DS39609B-page 10
 2004 Microchip Technology Inc.