From PICLIST@MITVMA.MIT.EDU Fri Nov 15 05:14:40 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id A340F2F00A2; Fri, 15 Nov 2002 05:14:40 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <21.007DB88C@cherry.ease.lsoft.com>; Fri, 15 Nov 2002 8:00:35 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 1917 for PICLIST@MITVMA.MIT.EDU; Fri, 15 Nov 2002 08:00:27 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 8587; Fri, 15 Nov 2002 07:58:39 -0500 Received: from *unknown [47.211.129.137] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Fri, 15 Nov 2002 07:58:38 EST X-Warning: mitvma.mit.edu: Host *unknown claimed to be znsgs01r.nortelnetworks.com Received: from zwcwc012.europe.nortel.com (zwcwc012.europe.nortel.com [47.160.46.124]) by znsgs01r.nortelnetworks.com (Switch-2.2.0/Switch-2.2.0) with ESMTP id gAFCwbV24564 for ; Fri, 15 Nov 2002 12:58:37 GMT Received: by zwcwc012.europe.nortel.com with Internet Mail Service (5.5.2653.19) id ; Fri, 15 Nov 2002 12:58:38 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Message-ID: Date: Fri, 15 Nov 2002 12:58:32 -0000 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Michael Rigby-Jones Subject: Re: [PIC]: 16F627 brown out? question To: PICLIST@MITVMA.MIT.EDU X-RCPT-TO: Status: R X-UIDL: 277600642 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ X-Evolution: 00000757-0000 > > Hello List, > > > > I have a 16F627 that appears to be sitting in some form of brownout. > The > oscillator is running, but she ceased executing code. > > > > Unfortunately, none of the fancy power up controls are enabled. MCLR is > disabled in the program fuses, along with the brown out detect and the > power > up timers. (Don't shoot me... I inherited the design. Did I remember to > tell you that the power supply powers up and down twice a second!!!!!) > > > > From this I gather she has gone into a brown out mode. Here is my exact > question: If in brown out, will the WDT cease to function? Or should it > apply a reset and get everything running again??? > If the chip is in a brown-out state, nothing will happen until the supply voltage is raised past the brown-out threshold. The brownout should itself cause a full reset. Mike -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.