PIC16LF1902-ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF1902-ESS

28-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

Microchip Technology 

PIC16LF1902/3

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

SOSCO (T1OSCO)

T1CKI

RC0

RC1

SOSC1 (T1OSCI)

RC1

RC2

SEG2

RC2

RC3

SEG6

RC3

RC4

SEG11

T1G

RC4

RC5

SEG10

RC5

RC6

SEG9

RC6

RC7

SEG8

RC7

Note 1: Priority listed from highest to lowest.

DS41455A-page 100

Preliminary

 2011 Microchip Technology Inc.

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