Date: Sun, 11 Jul 1999 16:34:42 -0600 From: Warner Losh <imp@village.org> To: Mark Murray <mark@grondar.za> Cc: Bill Paul <wpaul@skynet.ctr.columbia.edu>, hackers@FreeBSD.ORG Subject: Re: PCCARD and Vpp voltage Message-ID: <199907112234.QAA36877@harmony.village.org> In-Reply-To: Your message of "Sun, 11 Jul 1999 13:18:59 %2B0200." <199907111119.NAA16211@gratis.grondar.za> References: <199907111119.NAA16211@gratis.grondar.za>
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In message <199907111119.NAA16211@gratis.grondar.za> Mark Murray writes: : The low-voltage cards are keyed so you cannot plug them into 5v : slots; perhaps the dual-voltage slots have protective circuitry : that co-operates with this? Yes. The dual voltage cards are supposed to bring certain pins high and/or low to denote which voltages they like. In my brief reading of the Mindshare books, it appears that cards are only required to take 5V on Vcc, but aren't required to take it on Vpp. Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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