PIC18F2420/2520/4420/4520
TABLE 1-1:
DEVICE FEATURES
Features
PIC18F2420
PIC18F2520
PIC18F4420
PIC18F4520
Operating Frequency
DC – 40 MHz
16384
DC – 40 MHz
32768
DC – 40 MHz
16384
DC – 40 MHz
32768
Program Memory (Bytes)
Program Memory
(Instructions)
8192
16384
8192
16384
Data Memory (Bytes)
Data EEPROM Memory (Bytes)
Interrupt Sources
768
1536
768
1536
256
256
256
256
19
19
20
20
I/O Ports
Ports A, B, C, (E)
Ports A, B, C, (E)
Ports A, B, C, D, E
Ports A, B, C, D, E
Timers
4
2
0
4
2
0
4
1
1
4
1
1
Capture/Compare/PWM Modules
Enhanced
Capture/Compare/PWM Modules
Serial Communications
MSSP,
MSSP,
MSSP,
MSSP,
Enhanced USART
Enhanced USART
Enhanced USART
Enhanced USART
Parallel Communications (PSP)
10-Bit Analog-to-Digital Module
Resets (and Delays)
No
No
Yes
Yes
10 Input Channels
10 Input Channels
13 Input Channels
13 Input Channels
POR, BOR,
POR, BOR,
POR, BOR,
POR, BOR,
RESETInstruction,
Stack Full, Stack
RESETInstruction,
Stack Full, Stack
RESETInstruction,
Stack Full, Stack
RESETInstruction,
Stack Full, Stack
Underflow (PWRT, OST), Underflow (PWRT, OST), Underflow (PWRT, OST), Underflow (PWRT, OST),
MCLR (optional), WDT
MCLR (optional), WDT
MCLR (optional), WDT
MCLR (optional), WDT
Programmable
Yes
Yes
Yes
Yes
High/Low-Voltage Detect
Programmable Brown-out Reset
Instruction Set
Yes
Yes
Yes
Yes
75 Instructions;
83 with Extended
75 Instructions;
83 with Extended
75 Instructions;
83 with Extended
75 Instructions;
83 with Extended
Instruction Set Enabled
Instruction Set Enabled
Instruction Set Enabled
Instruction Set Enabled
Packages
28-Pin SPDIP
28-Pin SOIC
28-Pin QFN
28-Pin SPDIP
28-Pin SOIC
28-Pin QFN
40-Pin PDIP
44-Pin QFN
44-Pin TQFP
40-Pin PDIP
44-Pin QFN
44-Pin TQFP
© 2008 Microchip Technology Inc.
DS39631E-page 9
MICROCHIP [ MICROCHIP ]
