pull up or pull down function description

Michel Altheimer (michel.altheimer@galaxinc.com)
Thu, 17 Sep 1998 11:07:05 +0200

we have a pad which is an input pad with on its input a pullup :
___
|
| | <---- resistor
|_| |\
in ____|__________________| \_______ out
| /
|/

We did not manage to make a vital model to describe this behaviour.

In verilog the in pin is described as a tri1 wire, so when a Z is put
on in, the wire is set to a weak 1 by the simulator.

Is there such behaviour possible with vital models ?

Thanks a lot,

Michel.

Email : Michel_Altheimer@avanticorp.com