
PIC18F6525/6621/8525/8621
DS39612B-page 8
2005 Microchip Technology Inc.
1.2
Details on Individual Family
Members
The PIC18F6525/6621/8525/8621 devices are avail-
able
in
64-pin
(PIC18F6525/6621)
and
80-pin
(PIC18F8525/8621) packages. They are differentiated
from each other in four ways:
1.
Flash
program
memory
(48 Kbytes
for
PIC18F6525/8525
devices;
64 Kbytes
for
PIC18F6621/8621 devices).
2.
A/D
channels
(12
for
PIC18F6525/6621
devices; 16 for PIC18F8525/8621 devices).
3.
I/O ports (7 on PIC18F6525/6621 devices; 9 on
PIC18F8525/8621 devices).
4.
External program memory interface (present
only on PIC18F8525/8621 devices)
All other features for devices in the PIC18F6525/6621/
8525/8621 family are identical. These are summarized
Block
diagrams
of
the
PIC18F6525/6621
and
PIC18F8525/8621 devices are provided in
Figure 1-1TABLE 1-1:
PIC18F6525/6621/8525/8621 DEVICE FEATURES
Features
PIC18F6525
PIC18F6621
PIC18F8525
PIC18F8621
Operating Frequency
DC – 40 MHz
Program Memory (Bytes)
48K
64K
48K
64K
Program Memory (Instructions)
24576
32768
24576
32768
Data Memory (Bytes)
3840
Data EEPROM Memory (Bytes)
1024
External Memory Interface
No
Yes
Interrupt Sources
17
I/O Ports
Ports A, B, C, D,
E, F, G
Ports A, B, C, D,
E, F, G
Ports A, B, C, D, E,
F, G, H, J
Ports A, B, C, D, E,
F, G, H, J
Timers
5
Capture/Compare/PWM Modules
2
Enhanced Capture/Compare/
PWM Module
33
3
Serial Communications
MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
Parallel Communications
PSP
10-bit Analog-to-Digital Module
12 input channels
16 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
77 Instructions
Package
64-pin TQFP
80-pin TQFP