IO Expansion Using a 74hc165 Shift Registor

Guest · Posted: Wed Oct 25, 2006 7:14 pm

Hi I am using a 74hc165 Parallel to Serial shift register for port expansion in my project. Looking at the data sheet I am not too sure if it outputs
the MSB D7 first, or the LSB D0 first in the serial data stream.

Any ideas ?

Thanks Brian.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

The data is shifted out msb first. The D7 bit is the first bit that will be
shifted into the PIC. The D0 bit is the last to be shifted in.

Guest · Posted: Thu Oct 26, 2006 12:05 pm

Thanks for the info.

Brian