PIC18LF4580ISOSQTP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF4580ISOSQTP

28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2480/2580/4480/4580

11.3 PORTC, TRISC and LATC

Registers

PORTC is an 8-bit wide, bidirectional port. The corre-

sponding Data Direction register is TRISC. 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.,

put the contents of the output latch on the selected pin).

The Output Latch register (LATC) is also memory

mapped. Read-modify-write operations on the LATC

register read and write the latched output value for

PORTC.

PORTC is multiplexed with several peripheral functions

(Table 11-5). The pins have Schmitt Trigger input

buffers.

When enabling peripheral functions, care should be

taken in defining TRIS bits for each PORTC pin. Some

peripherals override the TRIS bit to make a pin an output,

while other peripherals override the TRIS bit to make a

pin an input. The user should refer to the corresponding

peripheral section for the correct TRIS bit settings.

Note: On a Power-on Reset, these pins are

configured as digital inputs.

The contents of the TRISC register are affected by

peripheral overrides. Reading TRISC always returns

the current contents, even though a peripheral device

may be overriding one or more of the pins.

EXAMPLE 11-3: INITIALIZING PORTC

CLRF

CLRF

MOVLW

MOVWF

PORTC

LATC

0CFh

TRISC

; Initialize PORTC by

; clearing output

; data latches

; Alternate method

; to clear output

; data latches

; Value used to

; initialize data

; direction

; Set RC<3:0> as inputs

; RC<5:4> as outputs

; RC<7:6> as inputs

© 2009 Microchip Technology Inc.

DS39637D-page 141

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