
2009 Microchip Technology Inc.
DS39632E-page 9
PIC18F2455/2550/4455/4550
TABLE 1-1:
DEVICE FEATURES
Features
PIC18F2455
PIC18F2550
PIC18F4455
PIC18F4550
Operating Frequency
DC – 48 MHz
Program Memory (Bytes)
24576
32768
24576
32768
Program Memory (Instructions)
12288
16384
12288
16384
Data Memory (Bytes)
2048
Data EEPROM Memory (Bytes)
256
Interrupt Sources
19
20
I/O Ports
Ports A, B, C, (E)
Ports A, B, C, D, E Ports A, B, C, D, E
Timers
4
Capture/Compare/PWM Modules
2
1
Enhanced Capture/
Compare/PWM Modules
00
1
Serial Communications
MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
MSSP,
Enhanced USART
Universal Serial Bus (USB)
Module
11
1
Streaming Parallel Port (SPP)
No
Yes
10-Bit Analog-to-Digital Module
10 Input Channels 10 Input Channels 13 Input Channels
13 Input Channels
Comparators
2
Resets (and Delays)
POR, BOR,
RESET Instruction,
Stack Full,
Stack Underflow
(PWRT, OST),
MCLR (optional),
WDT
POR, BOR,
RESET Instruction,
Stack Full,
Stack Underflow
(PWRT, OST),
MCLR (optional),
WDT
POR, BOR,
RESET Instruction,
Stack Full,
Stack Underflow
(PWRT, OST),
MCLR (optional),
WDT
POR, BOR,
RESET Instruction,
Stack Full,
Stack Underflow
(PWRT, OST),
MCLR (optional),
WDT
Programmable Low-Voltage
Detect
Yes
Programmable Brown-out Reset
Yes
Instruction Set
75 Instructions;
83 with Extended
Instruction Set
enabled
75 Instructions;
83 with Extended
Instruction Set
enabled
75 Instructions;
83 with Extended
Instruction Set
enabled
75 Instructions;
83 with Extended
Instruction Set
enabled
Packages
28-Pin PDIP
28-Pin SOIC
28-Pin PDIP
28-Pin SOIC
40-Pin PDIP
44-Pin QFN
44-Pin TQFP
40-Pin PDIP
44-Pin QFN
44-Pin TQFP