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Altera_Forum
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15 years ago

Problème programmation Pin

Hello, For the passage of a signal, I use a pin in High Impedance, I declare it with : HZ : out std_logic_vector(11 downto 0); HZ<="ZZZZZZZZZZZZ"; My problem is with...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

How do you check if HZ is in high impedance ?

I mean what circuit do you use to determine "high impedance" on those pins ?

Indeterminated state : do you mean it is sometimes 0 and other times it is 1 ?

Many chips have a internal weak pull-up resistor on their pins.