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Dear All:<br>
<br>
I found that if I don't plug the USB (include D+ and D- data) , the PMU
setting will not change in U-Boot.<br>
I remove U4905 and short the U4905( RT9711)'s VIN and VOUT. I set U4904
(AAT1275) to output 5V.<br>
I set MBCC7 =3 (suspend) and MBCC8 = 0, the total current doesn't
still increase<br>
<br>
Therefore, using 0 ohm resistor replace U4905 is maybe a solution. <br>
<br>
Best wish <br>
Allen Chang<br>
<br>
Allen Chang 提到:
<blockquote cite="mid:4806CEBA.1020809@openmoko.com" type="cite">forward~
<br>
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<div class="headerdisplayname" style="display: inline;">主旨: </div>
Re: [gta02] Fwd: PS: high rate of broken devices even on prodction
test. DESIGN BUG!</td>
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<div class="headerdisplayname" style="display: inline;">寄件者: </div>
Allen Chang <a class="moz-txt-link-rfc2396E" href="mailto:allen_chang@openmoko.com"><allen_chang@openmoko.com></a></td>
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<div class="headerdisplayname" style="display: inline;">日期: </div>
Thu, 17 Apr 2008 11:39:47 +0800</td>
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<div class="headerdisplayname" style="display: inline;">收件者
(To): </div>
Werner Almesberger <a class="moz-txt-link-rfc2396E" href="mailto:werner@openmoko.org"><werner@openmoko.org></a></td>
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<div class="headerdisplayname" style="display: inline;">收件者
(To): </div>
Werner Almesberger <a class="moz-txt-link-rfc2396E" href="mailto:werner@openmoko.org"><werner@openmoko.org></a></td>
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<div class="headerdisplayname" style="display: inline;">副本
(CC): </div>
GTA02 <a class="moz-txt-link-rfc2396E" href="mailto:gta02@lists.internal.openmoko.org"><gta02@lists.internal.openmoko.org></a></td>
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<br>
Hi Werner:
<br>
<br>
I set the MBCC7=3 (suspend) and MBCC8=0. I found the USB doesn't supply
any current for GTA02.
<br>
But I plug the USB power into GTA02, the PMU will change it's register
status. The MBCC will change back "1".
<br>
Can someone give me a SW which the MBCC always is "3"?
<br>
Therefore, I can make the DC-DC output 5V and found what happen?
<br>
<br>
Best Wish
<br>
Allen Chang
<br>
<br>
<br>
<br>
Werner Almesberger 提到:
<br>
<blockquote type="cite">Wolfgang Spraul wrote:
<br>
<blockquote type="cite">
<blockquote type="cite">o- either set max allowable USB current
of PCF50633 to 0mA when in hostmode,
<br>
</blockquote>
</blockquote>
<br>
That should work if we choose "suspend" in MBCC7.usbdevstat and set
<br>
MBCC8.usbenasus = 0
<br>
<br>
See also Figure 38 and Table 103.
<br>
<br>
Need verification, though. The PMU is complex enough for surprises ;-)
<br>
<br>
- Werner
<br>
<br>
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</blockquote>
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