what is a transparent latch?

[bradyue]

is there any diffs between transparent latch and D-latch?

 

[badola]

both are same

 

[shobhitk]

yes transparent latch and D-Latch is Same

 

[surisingh]

Hi,

Test compiler replaces latches with scannable latches wherever possible. If TC can't find scan cell equivalents for the latches, it marks the latches as non scan and issues warnings.

You can instruct TC to treat a non-scan latch as as a transparent latch using set_scan command.

In transparent mode, the values at the output pins of a latch depend only on the current values at the inputs, not on the stored value. A simple D-latch is in transparent mode when the enable pin is active.

D G Qactual Qtest compiler
0 1 0 0
1 1 1 1
x 0 Qprev x

Regards,
CSuresh

 

[vlsiva]

REPLY

Hi,
Whenever Enable signal is 1, You will get the same input as the output. THatsy we are referring latch as a transparent latch.

Regards,
siva
vlsiva@yahoo.co.in

 

[basha_vlsi]

both r same
latch is transparent to data

 

[abhi_k11]

yes both are same. Latch is said to be transaparent as it gives the same output as the input as long as there is enable to the latch is high.