> For the 18f1320 TRISA register, what are the individual direction bits
> designated for the register bits 0 to 4? The manual only shows the 4
> bits as alloted to "PORTA Data Direction Register", with no further
> direction, i.e. bit 0 >>RA0, and bit 4 >> RA4 ?
>
> I want the RA0 to RA2 as analog input, RA4 as digital output (unused),
> and RA5 MCLR tied high. I am thinking TRISA = 0b0001111. Is that
> correct, or do I have LSB/MSB backwards?
> --

TRISA = 0b0001111 makes RA0, RA1, RAd, and RA3 inputs, the rest of port A
outputs. I'd probably also make RA5 an input just in case you forget to
enable the MCLR pin in the config bits. If I'm not using MCLR as an I/O, I
tie it high through a 10k, then I can use the ICD-2 on it.

In Microchip C, you can access the individual bits of a TRIS register like
this:

TRISAbits.TIRSA0=1;
TRISAbits.TRISA1=1;
TRISAbits.TRISA2=1;
TRISAbits.TRISA3=1;

Hope that helps!

Harold


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