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74hc165 — Parallax Forums

74hc165

ArchiverArchiver Posts: 46,084
edited 2001-04-11 13:50 in General Discussion
HI,

I am trying to hook up some switches to a 74HC165 8 LIne Parallel to Sereial chip.· Does anybody have a schematic and code.· I tried something (see attached), but all I get is either 255 or 0 output.

I have the Sh/Ld pin on P0
Clock pin on P1
Qh pin on P2

Any help would be gratly appreciated
Thanks
Shocker


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Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-04-11 13:50
    For one thing, the '165 is a Serial· IN· , Parallel· OUT· .·

    Where are you trying to hook up your switches?·

    I also don't recall a Qh pin, but do recall· Q0 thru Q7.·

    Both data inputs have to be tied together or the unused one tied high.· How do you have yours hooked up?



    ·
    >>==AMROC==>
    David Funk· NAR 54612
    CanSat Phase I
    Compaq Computer Corp.
    281-514-8085 - office
    mailto:dave.funk@compaq.com


    Original Message
    From: Shocker [noparse][[/noparse]mailto:kmccuske@optonline.net]
    Sent: Sunday, April 01, 2001 2:30 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] 74HC165

    HI,

    I am trying to hook up some switches to a 74HC165 8 LIne Parallel to Sereial chip.· Does anybody have a schematic and code.· I tried something (see attached), but all I get is either 255 or 0 output.

    I have the Sh/Ld pin on P0
    Clock pin on P1
    Qh pin on P2

    Any help would be gratly appreciated
    Thanks
    Shocker
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