Microchip Technology MCP1631RD-MCC2 Data Sheet
PIC16F882/883/884/886/887
DS41291G-page 48
2006-2012 Microchip Technology Inc.
3.2.3.8
RA7/OSC1/CLKIN
shows the diagram for this pin. This pin is
configurable to function as one of the following:
• a general purpose I/O
• a crystal/resonator connection
• a clock input
• a general purpose I/O
• a crystal/resonator connection
• a clock input
FIGURE 3-8:
BLOCK DIAGRAM OF RA7
TABLE 3-1:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
I/O Pin
V
DD
V
SS
D
Q
CK
Q
D
Q
CK
Q
Data Bus
RD
PORTA
WR
PORTA
WR
TRISA
RD
TRISA
INTOSC
Mode
OSC1
CLKIN
Circuit
Oscillator
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Register
on Page
ADCON0
ADCS1
ADCS0
CHS3
CHS2
CHS1
CHS0
GO/DONE
ADON
ANSEL
ANS7
ANS6
ANS5
ANS4
ANS3
ANS2
ANS1
ANS0
CM1CON0
C1ON
C1OUT
C1OE
C1POL
—
C1R
C1CH1
C1CH0
CM2CON0
C2ON
C2OUT
C2OE
C2POL
—
C2R
C2CH1
C2CH0
CM2CON1
MC1OUT MC2OUT
C1RSEL
C2RSEL
—
—
T1GSS
C2SYNC
PCON
—
—
ULPWUE SBOREN
—
—
POR
BOR
OPTION_REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
PORTA
RA7
RA6
RA5
RA4
RA3
RA2
RA1
RA0
SSPCON
WCOL
SSPOV
SSPEN
CKP
SSPM3
SSPM2
SSPM1
SSPM0
TRISA
TRISA7
TRISA6
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
Legend:
x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.