1bit Hi-Z IN/OUT bidirection I/O
< Function description >
- File name
- HiZ_bidirect_1bit.nsl
- Function
- Example code of bidirectional signal with high impedance control.
- Explane
- Signal description
- This code shown bidirectional signal control example.
A bidirection lines are declared as ‘PortA’ and ‘PortB’.At ‘DIR’ signal is ‘L’ and ‘OEN’ is ‘H’, a value of ‘PortB’ is transfered to ‘PortA’.
At ‘DIR’ signal is ‘H’ and ‘OEN’ is ‘H’, a value of ‘PortA’ is transfered to ‘PortB’.Also, ‘OEN’ signal is ‘L’, ‘PortA’ and ‘PortB’ signals will be ‘Hi-Z’ status.
TruthTable :
----------------------------- | DIR | OEN | PortA | PortB | ----------------------------- | L | H | HiZ | PortA | | H | H | PortB | HiZ | | X | L | HiZ | HiZ | -----------------------------
- Note
- This function is same an one part of 74245 – TTL standard logic -.
