PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 12

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2450/4450
FIGURE 1-1:
DS39760A-page 10
Note 1:
OSC1
OSC2
T1OSI
T1OSO
MCLR
V
V
USB
DD
2:
Instruction Bus <16>
,
Program Memory
Table Pointer<21>
V
Address Latch
(24/32 Kbytes)
(1)
(2)
(2)
SS
HLVD
BOR
RE3 is multiplexed with MCLR and is only available when the MCLR Resets are disabled.
inc/dec logic
OSC1/CLKI and OSC2/CLKO are only available in select oscillator modes and when these pins are not being used as digital I/O. Refer
to Section 2.0 “Oscillator Configurations” for additional information.
Data Latch
21
Single-Supply
Programming
Debugger
Oscillator
Oscillator
In-Circuit
Internal
INTRC
PIC18F2450 (28-PIN) BLOCK DIAGRAM
Block
Timer0
20
8
Table Latch
ROM Latch
Instruction
Decode &
USB Voltage
Control
Regulator
PCLATU
PCU
Program Counter
IR
CCP1
31 Level Stack
STKPTR
PCH
PCLATH
Start-up Timer
Clock Monitor
Brown-out
Watchdog
Power-up
Power-on
Oscillator
Fail-Safe
8
Timer
Reset
Timer
Reset
Timer1
State Machine
Control Signals
PCL
Data Bus<8>
Advance Information
8
EUSART
Reference
Band Gap
BITOP
BSR
Timer2
4
3
8
Data Address<12>
Address
Address Latch
inc/dec
Decode
Data Memory
FSR0
FSR1
FSR2
Data Latch
logic
(2 Kbytes)
PRODH
8
ALU<8>
8 x 8 Multiply
12
W
12
8
8
Access
Bank
PRODL
10-bit
ADC
4
12
8
8
8
8
USB
PORTA
PORTB
PORTC
PORTE
© 2006 Microchip Technology Inc.
RA0/AN0
RA1/AN1
RA2/AN2/V
RA3/AN3/V
RA4/T0CKI/RCV
RA5/AN4/HLVDIN
OSC2/CLKO/RA6
RB0/AN12/INT0
RB1/AN10/INT1
RB2/AN8/INT2/VMO
RB3/AN9/VPO
RB4/AN11/KBI0
RB5/KBI1/PGM
RB6/KBI2/PGC
RB7/KBI3/PGD
RC0/T1OSO/T1CKI
RC1/T1OSI/UOE
RC2/CCP1
RC4/D-/VM
RC5/D+/VP
RC6/TX/CK
RC7/RX/DT
MCLR/V
PP
REF
REF
/RE3
-
+
(1)