On Fri, 24 Jan 2003, Tal wrote:

*>Can an input of a PIC be connected directly to VDD to set a High level ?
*>What about other digital IC's such as 74HCXXX or FPGA's ?
*>
*>One of my guys here insists that input should be tied to VDD through a
*>resistor.

It's ok for a PIC but not for older 74xx. 74[H]Cxx inputs can be connected
directly to Vdd. FPGAs are usually cmos, so yes, unless the manufacturer
says otherwise. You would use a pullup if you plan to drive the pin low at
some time or other (f.ex. MCLR on a PIC).

Peter

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