NOTE:  Since TRIS registers on 'xx devices are readable and writable, they can be accessed as a normal File Register. To maintain upward compatibility with future devices,  the " ! "  qualifier should not be used when coding for 'xx devices.

MOV        !port_fr,#literal   Move literal into port_fr’s I/O control register

Words:        2        Cycles:        2                Affects:        none

Operation:        Literal is moved into the I/O control register of port_fr via W. A "1" bit in W disables the corresponding port pin’s output buffer, allowing input use, while a "0" bit enables the output buffer for high or low output. Port_fr must be (at Address) 5, 6, or 7.

Coding:        MOVLW        literal

               TRIS                port_fr

MOV        !port_fr,fr        Move fr into port_fr’s I/O control register

Words:        2        Cycles:        2                Affects:        Z

Operation:        Fr is moved into the I/O control register of port_fr via W. A "1" bit in W disables the corresponding port pin’s output buffer, allowing input use, while a "0" bit enables the output buffer for high or low output. Z will be set to 1 if the value moved was 0, otherwise Z will be cleared to 0. Port_fr must be (at Address) 5, 6, or 7.

Coding:        MOVF        fr,0

       TRIS                port_fr6

MOV        !port_fr,W        Move W into port_fr’s I/O control register

Words:        1        Cycles:        1                Affects:        none

Operation:        W is moved into the I/O control register of port_fr. A "1" bit in W disables the corresponding port pin’s output buffer, allowing input use, while a "0" bit enables the output buffer for high or low output. Port_fr must be (at Address) 5, 6, or 7.

Coding:        TRIS                port_fr