PIC18F2450 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F2450

24/40/44-Pin High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC18F2450/4450

FIGURE 1-2:

PIC18F4450 (40/44-PIN) BLOCK DIAGRAM

Table Pointer<21>

Data Bus<8>

inc/dec logic

21

20

88

PCLATU PCLATH

PCU PCH PCL

Program Counter

Address Latch

Program Memory

(24/32 Kbytes)

Data Latch

31 Level Stack

STKPTR

Data Latch

Data Memory

(2 Kbytes)

Address Latch

12

Data Address<12>

4

BSR

12

FSR0

FSR1

FSR2

4

Access

Bank

12

8

Table Latch

inc/dec

logic

ROM Latch

Instruction Bus <16>

IR

Address

Decode

PORTA

PORTB

PORTC

VDD, VSS

OSC1(2)

OSC2(2)

T1OSI

T1OSO

ICPGC(3)

ICPGD(3)

ICPORTS(3)

ICRST(3)

MCLR(1)

VUSB

Instruction

Decode &

Control

State Machine

Control Signals

8

PRODH PRODL

Internal

Oscillator

Block

INTRC

Oscillator

Single-Supply

Programming

In-Circuit

Debugger

Power-up

Timer

Oscillator

Start-up Timer

Power-on

Reset

Watchdog

Timer

Brown-out

Reset

Fail-Safe

Clock Monitor

USB Voltage

Regulator

3

BITOP

8

8 x 8 Multiply

8

W

8

8

8

8

ALU<8>

8

Band Gap

Reference

PORTD

PORTE

RA0/AN0

RA1/AN1

RA2/AN2/VREF-

RA3/AN3/VREF+

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

RD0

RD1

RD2

RD3

RD4

RD5

RD6

RD7

RE0/AN5

RE1/AN6

RE2/AN7

MCLR/VPP/RE3(1)

BOR

HLVD

Timer0

Timer1

Timer2

CCP1

EUSART

ADC

10-Bit

USB

Note 1:

2:

3:

RE3 is multiplexed with MCLR and is only available when the MCLR Resets are disabled.

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.

These pins are only available on 44-pin TQFP under certain conditions. Refer to Section 18.9 “Special ICPORT Features (Designated

Packages Only)” for additional information.

© 2008 Microchip Technology Inc.

DS39760D-page 11

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