Help in addressing pins of AT89C4051.

[vinash]

Hi,
I do have a very fundamental question to ask, How do i directly address port 3.6 directly instead of using ((P3&0x40)?
as P3.6 is hard-wired as an input to the output of the on-chip comparator and is not accessible as a general-purpose I/O pin.for (AT89C4051)

I cant simply use the command,
#define P3_6=0xB6 rite?
Please do help. Thank you

 

[techie]

Simple.
In C, you use
sbit COMP_INP = P3^6;

if (COMP_INP == 1) do this and that

in A51, you use
COMP_INP EQU P3.6

JB COMP_INP,LABEL