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Old 11-25-2007, 10:51 AM
glen herrmannsfeldt
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Default Re: using fpga as programmable connection

joe wrote:

> i would like to use a small fpga (or cpld) on a pcb to make direct
> bidirectional connections between pins.
> basically it should act like a programmable "cable".
> is this kind of application possible using programmable logic?


http://www.intersil.com/cda/devicein...4,00.html#data

is one of many devices made for this purpose. Though some have built in
buffers, and so are not bidirectional, others are.

You can use tristate drivers in most FPGAs, so that you could select
the direction, but internally the datapaths are programmed directionally.

-- glen

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