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'[OT]: Cascade two HC165?'
2001\04\11@172154 by Thomas N

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Hi everyone,

Have any of you cascade two HC165 together?  I tried to cascade them, but I
can only get the data input of the last one!  I read the specs but it
doesn't mention if it can cascade them or not.  If it is possible, then I
may need to check the circuit or the code again!

Please help!

Regards,
Thomas


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2001\04\11@175608 by Jinx

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> Have any of you cascade two HC165 together?  I tried to
> cascade them, but I can only get the data input of the last one!
> I read the specs but it doesn't mention if it can cascade them
> or not.  If it is possible, then I may need to check the circuit
> or the code again!

Ignoring the Parallel Load function by setting PL high, the 165
acts as an ordinary 8-bit shift register. A rising clock will right
shift the data through the first 165 and into the second, if you
have both active clocks pins on each connected. Maybe the
clock/shift propogation delay is causing the problem, although
that would perhaps explain being a bit behind, not a whole
byte being unavailable

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