PIC16LF1904 Datasheet, PDF (108/288 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

PIC16LF1904/6/7
11.3 PORTC Registers
PORTC is an 8-bit wide bidirectional port. The
corresponding data direction register is TRISC
(Register 11-6). Setting a TRISC bit (= 1) will make the
corresponding PORTC pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISC bit (= 0) will make the corresponding
PORTC pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 11-1 shows how to initialize an I/O port.
Reading the PORTC register (Register 11-5) reads the
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then written
to the PORT data latch (LATC).
The TRISC register (Register 11-6) controls the PORTC
pin output drivers, even when they are being used as
analog inputs. The user should ensure the bits in the
TRISC register are maintained set when using them as
analog inputs. I/O pins configured as analog input always
read ‘0’.
11.3.1
PORTC FUNCTIONS AND OUTPUT
PRIORITIES
Each PORTC pin is multiplexed with other functions. The
pins, their combined functions and their output priorities
are shown in Table 11-7.
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the highest priority.
Analog input and some digital input functions are not
included in the list below. These input functions can
remain active when the pin is configured as an output.
Certain digital input functions override other port
functions and are included in Table 11-7.
TABLE 11-7: PORTC OUTPUT PRIORITY
Pin Name
Function Priority⁽¹⁾
RC0
T1OSO
T1CKI
RC0
RC1
T1OSI
RC1
RC2
SEG2
RC2
RC3
SEG6
RC3
RC4
SEG11
T1G
RC4
RC5
SEG10
RC5
RC6
SEG9
RC6
TX/CK
RC7
SEG8
RC7
RX/DT
Note 1: Priority listed from highest to lowest.
DS41569A-page 108
Preliminary
 2011 Microchip Technology Inc.