Datasheet
PIC18F66K80 FAMILY
DS39977F-page 602 2010-2012 Microchip Technology Inc.
APPENDIX B: MIGRATION TO
PIC18F66K80 FAMILY
Devices in the PIC18F66K80, PIC18F4580,
PIC18F4680 and 18F8680 families are similar in their
functions and features. Code can be migrated from the
other families to the PIC18F66K80 without many
changes. The differences between the device families
are listed in Tabl e B-1 and Tab le B -2 . For more details
on migrating to the PIC18F66K80, refer to
“PIC18FXX80 to PIC18FXXK80 Migration Guide”
(DS39982).
TABLE B-1: NOTABLE DIFFERENCES BETWEEN 28, 40 AND 44-PIN DEVICES – PIC18F66K80,
PIC18F4580 AND PIC18F4680 FAMILIES
Characteristic PIC18F66K80 Family PIC18F4680 Family PIC18F4580 Family
Max Operating Frequency 64 MHz 40 MHz 40 MHz
Max Program Memory 64 Kbytes 64 Kbytes 32 Kbytes
Data Memory (bytes) 3,648 3,328 1,536
CTMU Yes No No
SOSC Oscillator Options Low-power oscillator option for SOSC No options No options
T1CKI Clock T1CKI can be used as a clock without
enabling the SOSC oscillator
No No
INTOSC Up to 16 MHz Up to 8 MHz Up to 8 MHz
Timers Two 8-bit, three 16-bit One 8-bit, three 16-bit One 8-bit, three 16-bit
ECCP One for all devices 40 and 44-pin devices – One
28-pin devices – None
40 and 44-pin devices – One
28-pin devices – None
CCP Four One One
Data EEPROM (bytes) 1,024 1,024 256
WDT Prescale Options 22 16 16
5V Operation 18FXXK80 parts – 5V operation
18LFXXK80 parts – 3.3V operation
Yes Yes
nanoWatt XLP Yes No No
Regulator 18FXXK80 parts – Yes
18LFXXK80 parts – No
No No
Low-Power BOR Yes No No
A/D Converter 12-bit signed differential 10-bit 10-bit
A/D Channels
28-pin devices – 8 Channels
40 and 44-pin devices – 11 Channels
8 Channels for 28-pin devices/
11 Channels for 40 and 44-pin devices
8 Channels for 28-pin devices/
11 Channels for 40 and 44-pin devices
Internal Temp Sensor Yes No No
EUSART Two One One
Comparators Two 28-pin devices – None
40 and 44-pin devices – Two
28-pin devices – None
40 and 44-pin devices – Two
Oscillator Options 14 Nine Nine
Ultra Low-Power Wake-up
(ULPW)
Yes No No
Adjustable Slew Rate for I/O Yes No No
PLL Available for all oscillator options Available only for high-speed crystal
and internal oscillator
Available only for high-speed
crystal and internal oscillator
TXM Modulator No No No