
2006 Microchip Technology Inc.
DS39564C-page 7
PIC18FXX2
1.0
DEVICE OVERVIEW
This document contains device specific information for
the following devices:
These devices come in 28-pin and 40/44-pin packages.
The 28-pin devices do not have a Parallel Slave Port
(PSP) implemented and the number of Analog-to-
Digital (A/D) converter input channels is reduced to 5.
The following two figures are device block diagrams
sorted by pin count: 28-pin for
Figure 1-1 and 40/44-pin
TABLE 1-1:
DEVICE FEATURES
PIC18F242
PIC18F442
PIC18F252
PIC18F452
Features
PIC18F242
PIC18F252
PIC18F442
PIC18F452
Operating Frequency
DC - 40 MHz
Program Memory (Bytes)
16K
32K
16K
32K
Program Memory (Instructions)
8192
16384
8192
16384
Data Memory (Bytes)
768
1536
768
1536
Data EEPROM Memory (Bytes)
256
Interrupt Sources
17
18
I/O Ports
Ports A, B, C
Ports A, B, C, D, E Ports A, B, C, D, E
Timers
4
Capture/Compare/PWM Modules
2
Serial Communications
MSSP,
Addressable
USART
MSSP,
Addressable
USART
MSSP,
Addressable
USART
MSSP,
Addressable
USART
Parallel Communications
—
PSP
10-bit Analog-to-Digital Module
5 input channels
8 input channels
RESETS (and Delays)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
Programmable Low Voltage
Detect
Yes
Programmable Brown-out Reset
Yes
Instruction Set
75 Instructions
Packages
28-pin DIP
28-pin SOIC
28-pin DIP
28-pin SOIC
40-pin DIP
44-pin PLCC
44-pin TQFP
40-pin DIP
44-pin PLCC
44-pin TQFP