File name

HiZ_SinglePin_INOUT.nsl

Function

Example code of uni-direction signal with high impedance control.

Signal description

This code shown uni-direction signal control example.
A uni-direction line is declared as ‘HiZIO_pin’.
A ‘IN_from_HiZIO’ siglal is declared as input signal.

At ‘OEN’ is ‘H’, a value of ‘OUT_to_HiZIO’ is transfered to ‘HiZIO_pin’.
Also, ‘OEN’ signal is ‘L’, ‘HiZIO_pin’ signal will be ‘Hi-Z’ status.

OEN	OUT_to_HiZIO
L	HiZ
H	OUT_to_HiZIO

By the way, a ‘IN_from_HiZIO’ signal always reflects ‘HiZIO_pin’ value.
This signal value is not effected by ‘OEN’ signal.

Note

Even if designer wants to need an output direction signal, it **SHOULD** declare ‘High-Impedance’ pin with ‘**INOUT**’ property.
The NSL synthesis tool does not generate ‘High-Impedance’ pin with ‘output’ property.