From owner-freebsd-arm@freebsd.org Mon May 18 02:14:37 2020 Return-Path: Delivered-To: freebsd-arm@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 02E882FC7B7 for ; Mon, 18 May 2020 02:14:37 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 49QMz019Cbz43np for ; Mon, 18 May 2020 02:14:35 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id 04I2EXPV098653; Sun, 17 May 2020 19:14:33 -0700 (PDT) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: (from freebsd-rwg@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id 04I2EXWA098652; Sun, 17 May 2020 19:14:33 -0700 (PDT) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <202005180214.04I2EXWA098652@gndrsh.dnsmgr.net> Subject: Re: Recommended arm hardware (mostly for compilation)? In-Reply-To: To: Mark Millard Date: Sun, 17 May 2020 19:14:33 -0700 (PDT) CC: Philipp Klaus Krause , freebsd-arm@freebsd.org X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: 49QMz019Cbz43np X-Spamd-Bar: + Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of freebsd-rwg@gndrsh.dnsmgr.net has no SPF policy when checking 69.59.192.140) smtp.mailfrom=freebsd-rwg@gndrsh.dnsmgr.net X-Spamd-Result: default: False [1.92 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.02)[0.018]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[dnsmgr.net]; AUTH_NA(1.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_NA(0.00)[no SPF record]; FREEMAIL_TO(0.00)[yahoo.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; ASN(0.00)[asn:13868, ipnet:69.59.192.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 May 2020 02:14:37 -0000 > > On 2020-May-17, at 12:56, Philipp Klaus Krause wrote: > > > Am 17.05.20 um 21:45 schrieb Mark Millard: > >> > >> HoneyComb-LX2K-datasheet.pdf reports: > >> > >> Safety Notice > >> > >> ? This device is to be used with Certified Power adaptor with output rated 12VDC, 1.5A. > > > > AFAIK, the processor's TDP alone is already 30W > > (https://www.nxp.com/docs/en/supporting-information/LX2160A-NXP-Biggest-Multicore.pdf), > > so I don't believe 18W for the whole board. > > And LPS limits things to under 8 amps for 12V, as I remember. > (But look it up if you care.) 8 amps is the current limit into a short circuit, aka 0V output, it is an unusable state to power anything. The usable current limit is 5A, or for 12VDC nominal 60W. > I took the two references (1.5A and LPS) as a minimum to maximum > indication to accommodate a range of usage contexts. > > === > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) > > _______________________________________________ > freebsd-arm@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" > > -- Rod Grimes rgrimes@freebsd.org