PIC18F23K20 Datasheet, PDF (121/420 Pages) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2XK20/4XK20
TABLE 10-1: PORTA I/O SUMMARY (CONTINUED)
Pin
Function
TRIS
Setting
I/O
I/O
Type
Description
OSC1/CLKIN/RA7
RA7
0
O DIG LATA<7> data output. Disabled in external oscillator modes.
1
I
TTL PORTA<7> data input. Disabled in external oscillator modes.
OSC1
x
I ANA Main oscillator input connection.
CLKIN
x
I ANA Main clock input connection.
Legend: DIG = Digital level output; TTL = TTL input buffer; ST = Schmitt Trigger input buffer; ANA = Analog level input/output;
x = Don’t care (TRIS bit does not affect port direction or is overridden for this option).
TABLE 10-2: SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values
on page
PORTA
RA7⁽¹⁾
RA6⁽¹⁾
RA5
RA4
RA3
RA2
RA1
RA0
60
LATA
LATA7⁽¹⁾ LATA6⁽¹⁾ PORTA Data Latch Register (Read and Write to Data Latch)
60
TRISA
TRISA7⁽¹⁾ TRISA6⁽¹⁾ PORTA Data Direction Control Register
60
ANSEL
ANS7⁽²⁾ ANS6⁽²⁾ ANS5⁽²⁾ ANS4
ANS3
ANS2
ANS1
ANS0
60
SLRCON
—
—
—
SLRE SLRD SLRC SLRB SLRA
61
CM1CON
C1ON C1OUT C1OE C1POL C1SP
C1R C1CH1 C1CH0
60
CM2CON
C2ON C2OUT C2OE C2POL C2SP
C2R C2CH1 C2CH0
60
CVRCON
CVREN CVROE CVRR CVRSS CVR3
CVR2
CVR1
CVR0
59
Legend:
Note 1:
2:
— = unimplemented, read as ‘0’. Shaded cells are not used by PORTA.
RA<7:6> and their associated latch and data direction bits are enabled as I/O pins based on oscillator
configuration; otherwise, they are read as ‘0’.
Not implemented on PIC18F2XK20 devices.
© 2007 Microchip Technology Inc.
Advance Information
DS41303B-page 119