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IO Ports

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A2

Tristate Input Output Ports

PORTA, PORTB and PORTC

TRISA, TRISB and TRISC

Data I/O Example

CTRL+Click here to run the simulator.

Send data to four of the eight LEDs. Click (red highlight) to connect the LEDs to PORTA.

Assm-LEDs.gif

INIT:
    MOVW    0xF0    ; IIIIOOOO
    MOVWR   TRISA   ; PORTA has four
                    ; inputs and four
                    ; outputs
LOOP:
    MOVW    0xAA    ; 10101010 test data
    MOVWR   PORTA   ; Write data to PORTA
    MOVW    0x55    ; 01010101 test data
    MOVWR   PORTA   ; Write data to PORTA
    JMP     LOOP

 

 

 

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