Datasheet
PIC18F6525/6621/8525/8621
DS39612C-page 8 2003-2013 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
in Table 1-1.
Block diagrams of the PIC18F6525/6621 and
PIC18F8525/8621 devices are provided in Figure 1-1
and Figure 1-2, respectively. The pinouts for these
device families are listed in Table 1-2.
TABLE 1-1: PIC18F6525/6621/8525/8621 DEVICE FEATURES
Features PIC18F6525 PIC18F6621 PIC18F8525 PIC18F8621
Operating Frequency DC – 40 MHz DC – 40 MHz DC – 40 MHz DC – 40 MHz
Program Memory (Bytes) 48K 64K 48K 64K
Program Memory (Instructions) 24576 32768 24576 32768
Data Memory (Bytes) 3840 3840 3840 3840
Data EEPROM Memory (Bytes) 1024 1024 1024 1024
External Memory Interface No No Yes Yes
Interrupt Sources 17 17 17 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 5 5 5
Capture/Compare/PWM Modules 2 2 2 2
Enhanced Capture/Compare/
PWM Module
3333
Serial Communications MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
MSSP,
Addressable
EUSART (2)
Parallel Communications PSP PSP PSP PSP
10-bit Analog-to-Digital Module 12 input channels 12 input channels 16 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 Yes Yes Yes
Programmable Brown-out Reset Yes Yes Yes Yes
Instruction Set 77 Instructions 77 Instructions 77 Instructions 77 Instructions
Package 64-pin TQFP 64-pin TQFP 80-pin TQFP 80-pin TQFP