Hi, Just measured voltage & current of #1 & #4 M1 boards[1]. FYI first! >From this results, those 4 pcs on your side should be good enough based on the same processes produced. I can only say previous method we directly injected is wrong. But why caused that? Don't know yet. Truly funny things on p31 of [2]. Hopefully my FAE can reply me a reasonable answer soon. I am also curious about ramp time on each supply loop. There are Notes mentioned on p6 of [3] like you said before. "The actual current consumed depends on the power-on ramp rate of the power supply." Well, hopefully I can figure them out. :) Adam
[1] http://en.qi-hardware.com/wiki/Milkymist_One_RC1_Reports [2] http://www.xilinx.com/support/documentation/user_guides/ug394.pdf [3] http://www.xilinx.com/support/documentation/data_sheets/ds162.pdf On Fri, Jun 18, 2010 at 11:05 PM, Sébastien Bourdeauducq <[email protected]> wrote: > > ---------- Forwarded Message ---------- > > Subject: Re: [Milkymist-devel] Debug status of MM One initial test > Date: Friday 18 June 2010 > From: Uwe Bonnes <[email protected]> > To: Sébastien Bourdeauducq <[email protected]> > >>>>>> "Sébastien" == Sébastien Bourdeauducq > <[email protected]> writes: > > Sébastien> On Friday 18 June 2010 11:25:28 Uwe Bonnes wrote: > >> On my XC6S45SLX-CE Board we measured 90 mA with the switcher (LDO03) > >> in parallel. I have no easy way to disconnect th switcher. > > Sébastien> I don't understand the details of this measurement. Does that > Sébastien> mean that you have measured 90mA going into an LDO03 > Sébastien> regulator module used to supply 1V2 to the FPGA (and nothing > Sébastien> else)? > > I fed the _output_ of the LDO03 with 1.2 Volt. As this output supplies > VCCINT, that meant that I applied VCCINT. However I don't know exactly, what > an LDO03 does with the output siupplied with voltage but the input not > supplied. > > > Sébastien> Is the 90mA measured on the 1V2, or at the input of the > Sébastien> regulator? What was the regulator input voltage? > > 90 mA on an external 1.2V supply, feeding the _output_ of the regulator > > -- > Uwe Bonnes [email protected] > > Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt > --------- Tel. 06151 162516 -------- Fax. 06151 164321 ---------- > _______________________________________________ > http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org > IRC: #milkym...@freenode > Webchat: www.milkymist.org/irc.html > Wiki: www.milkymist.org/wiki > _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkym...@freenode Webchat: www.milkymist.org/irc.html Wiki: www.milkymist.org/wiki
