From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Hawkins Date: Wed, 12 Sep 2007 13:09:36 -0700 Subject: [U-Boot-Users] R: Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg) In-Reply-To: References: Message-ID: <46E84780.3080602@ovro.caltech.edu> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de DI BACCO ANTONIO - technolabs wrote: > > Is there any chance that the board is broken? I think I connected a > wiggler to the BDM port in the > wrong position for only a while. But > why should it boot with attached BDI if is it broken? > > I discovered that when the board is powered on, if I try to connect BDI > connector trying to touch only pin 1 and 2 (vfls0 and sreset) the board > starts. I suspect that bdi pulls up the sreset in some way. The JTAG/COP header *should* have the appropriate pull-ups for HRESET#, and SRESET# *on the board*. These are open-drain signals. However, there could be a mistake on your board, and perhaps the BDI2000 has weak pull-ups on the BDI 'just in case' the pull-ups are missing on the target. Check your board schematic. Dave