Datasheet

PIC14000
DS40122B-page 30
Preliminary
 1996 Microchip Technology Inc.
FIGURE 5-6: PORTC DATA REGISTER
U= unimplemented, X = unknown.
07h Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PORTC RC7/SDAA RC6/SCLA RC5 RC4 RC3/T0CKI RC2 RC1/CMPA RC0/REFA
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
POR value xxh x xxxxxx x
Bit Name Function
B7 RC7/SDAA
Synchronous serial data I/O for I
2
C interface. Also is the serial programming data line.
This pin can also serve as a general purpose I/O. If enabled, a change on this pin can
cause a CPU interrupt. This pin has an N-channel pull-up to V
DD
which is disabled in
I
2
C mode.
B6 RC6/SCLA
Synchronous serial clock for I
2
C interface. Also is the serial programming clock. This pin
can also serve as a general purpose I/O. If enabled, a change on this pin can cause a
CPU interrupt. This pin has an N-channel pull-up to V
DD
which is disabled in I
2
C mode.
B5 RC5 LED direct-drive output. This pin can also serve as a GPIO. If enabled, a change on this
pin can cause a CPU interrupt. If enabled, this pin has a weak internal pull-up to V
DD
.
B4 RC4 LED direct-drive output. This pin can also serve as a GPIO. If enabled, a change on this
pin can cause a CPU interrupt. If enabled, this pin has a weak internal pull-up to V
DD
.
B3 RC3/T0CKI LED direct-drive output. This pin can also serve as a GPIO. If enabled, this pin has a
weak internal pull-up to V
DD
. T0CKI is enabled as TMR0 clock via the OPTION register.
B2 RC2 LED direct-drive output. This pin can also serve as a GPIO. If enabled, this pin has a
weak internal pull-up to V
DD
.
B1 RC1/CMPA LED direct-drive output. This pin can also serve as a GPIO, or comparator A output. If
enabled, this pin has a weak internal pull-up to V
DD
.
B0 RC0/REFA LED direct-drive output. This pin can also serve as a GPIO, or programmable reference
A output. If enabled, this pin has a weak internal pull-up to V
DD
.