1. This forum section is a read-only archive which contains old newsgroup posts. If you wish to post a query, please do so in one of our main forum sections (here). This way you will get a faster, better response from the members on Motherboard Point.

H clamp on USB Host Controller

Discussion in 'Embedded' started by aubrey, Mar 9, 2008.

  1. aubrey

    aubrey Guest

    I was reading S17998E.pdf, the datasheet for the NEC uPD720102 Host

    In table 2.1 it says to use an "H" clamp on a certain pin if it is

    Does this just mean a 10K pullup or is it something more exotic?
    aubrey, Mar 9, 2008
    1. Advertisements

  2. aubrey

    Rich Webb Guest

    From the context in the data sheet, where the OCI pins are active low,
    it looks like they mean '"H" clamp' as in 'clamp high'.

    Not the clearest usage, certainly. My first guess (before looking at
    the data sheet) was that they may have meant an H-"shaped" clamp,
    i.e., clamp to Vcc/2 with a voltage divider. That ain't it, tho.
    Rich Webb, Mar 10, 2008
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.