Adam Wang wrote: > applied and noted 1% is default in Power.sch Hmm, would that default only to Power.sch ? Or to the whole circuit ? If it's only in Power.sch, this creates the problem that the component to sheet relation is lost in the BOM. Thus BOOM couldn't tell whether to use a per-sheet default or a global default.
> > - AUDIO (MK1): do we want to put a part number (MCE-100, it seems) > > in the schematics ? > > > > > It was invisible. but now I deleted. Ah, I meant the opposite: specify what part we use. Just "it's a microphone" seems a bit generic. (At least to me.) > > - AUDIO (near AC97_SYNC): seems that TP6, TP7, and TP8 were lost > > in translation. > > > > fixed. Ah, very nice ! I like the style of putting TPs somewhere where they're easy to find. > > - MiscControl (J9, J10): here, it would be useful if the numbers > > of the pins on the connector would be indicated, like you did > > on the DMX connectors, since the connector pin numbering > > doesn't follow the symbol/footprint numbering. > > > > applied texts of number. Hmm, are you sure the pins in the connector are numbered like this ? The data sheet says (left to right) 5-4-3-2-1, not 3-5-2-4-1. > > - AUDIO (near V24): the text is very close to AUDIO_AGND and > > also the two text lines touch each other. > > > > applied also fixed cross-style junctions. Good catch ! I found one more: right above C34. > see here: > http://lists.milkymist.org/htdig.cgi/devel-milkymist.org/2010-October/000952.html > http://en.qi-hardware.com/wiki/Milkymist_One_RC2_Layout_History#20101028 Hmm. So we have: Pin 1 3 9 15 18 33 U14 C162 C243 C163+C244 C164 C245 C240+C165 U15 C159 C251 C158+C252 C157 C156 C248+C161 Pin 55 61 U14 C242 C166 U15 C250 C160 So if C156 corresponds to C245, wouldn't it look more natural right of C252. I.e., at the position of C245 in the U14 block. Let's compare the capacitances: Pin 1: C162 = 100 nF, C159 = 10 nF Pin 3: C243 = C251 = 100 nF Pin 9: C163+C244 = C158+C252 = 110 nF Pin 15: C164 = 10 nF, C157 = 100 nF Pin 18: C245 = 100 nF, C156 = 1 uF Pin 33: C240+C165 = C248+C161 = 100.01 uF Pin 55: C242 = C250 = 100 nF Pin 61: C166 = C160 = 10 nF Why the difference on pins 1, 15, and 18 ? I don't see an explanation for asymmetrical bypassing for U14 and U15 in the signal integrity analysis. By the way, it might would improve the schematics if groups of bypass caps had comments next to them that indicate the respective pin. E.g., "(1)" next to C162, and so on. Particularly if the caps have different values, it's not trivial to guess what goes where. Such comments may even help the layout guys :-) - Werner _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkymist@Freenode
