Datasheet

© 2007 Microchip Technology Inc. DS39629C-page 123
PIC18F6390/6490/8390/8490
TABLE 9-12: PORTF FUNCTIONS
Pin Name Function
TRIS
Setting
I/O Buffer Description
RF0/AN5/
SEG18
RF0 0 O DIG LATF<0> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<0> data input. Reads ‘0’ on POR.
AN5 1 I ANA A/D input channel 5. Default configuration on POR.
SEG18 x O ANA Segment 18 analog output for LCD.
RF1/AN6/
C2OUT/SEG19
RF1 0 O DIG LATF<1> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<1> data input. Reads ‘0’ on POR.
AN6 1 I ANA A/D input channel 6. Default configuration on POR.
C2OUT 0 O DIG Comparator 2 output; takes priority over port data.
SEG19 x O ANA Segment 19 analog output for LCD.
RF2/AN7/
C1OUT/SEG20
RF2 0 O DIG LATF<2> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<2> data input. Reads ‘0’ on POR.
AN7 1 I ANA A/D input channel 7. Default configuration on POR.
C1OUT 0 O TTL Comparator 1 output; takes priority over port data.
SEG20 x O ANA Segment 20 analog output for LCD.
RF3/AN8/
SEG21
RF3 0 O DIG LATF<3> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<3> data input. Reads ‘0’ on POR.
AN8 1 I ANA A/D input channel 8 and Comparator C2+ input. Default input
configuration on POR; not affected by analog output.
SEG21 x O ANA Segment 21 analog output for LCD.
RF4/AN9/
SEG22
RF4 0 O DIG LATF<4> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<4> data input. Reads ‘0’ on POR.
AN9 1 I ANA A/D input channel 9 and Comparator C2- input. Default input
configuration on POR; does not affect digital output.
SEG22 x O ANA Segment 22 analog output for LCD.
RF5/AN10/
CV
REF/SEG23
RF5 0 O DIG LATF<5> data output. Output unaffected by analog input; disabled
when either LCD segment or CVREF is enabled.
1 I ST PORTF<5> data input. Reads ‘0’ on POR.
AN10 1 I ANA A/D input channel 10 and Comparator C1+ input. Default input
configuration on POR.
CV
REF 0 O ANA Comparator voltage reference output. Enabling this feature disables
digital I/O.
SEG23 x O ANA Segment 23 analog output for LCD.
RF6/AN11/
SEG24
RF6 0 O DIG LATF<6> data output. Output is unaffected by analog input; disabled
when LCD segment is enabled.
1 I ST PORTF<6> data input. Reads ‘0’ on POR.
AN11 1 I ANA A/D input channel 11 and Comparator C1- input. Default input
configuration on POR; does not affect digital output.
SEG24 x O ANA Segment 24 analog output for LCD.
RF7/SS
/SEG25 RF7 0 O DIG LATF<7> data output; disabled when LCD segment is enabled.
1 I ST PORTF<7> data input.
SS
1 I TTL Slave select input for MSSP module.
SEG25 x O ANA Segment 25 analog output for LCD.
Legend: O = Output, I = Input, ANA = Analog Signal, DIG = Digital Output, ST = Schmitt Buffer Input, TTL = TTL Buffer Input,
x = Don’t care (TRIS bit does not affect port direction or is overridden for this option).