Hi, Thank you for this remind.
I've also recorded them here http://en.qi-hardware.com/wiki/Milkymist_One_RC1_Known_Issues Will follow up. Adam On Mon, Aug 30, 2010 at 6:10 AM, Sébastien Bourdeauducq < [email protected]> wrote: > As a reminder, here is the errata for the RC1 PCB: > (from http://www.milkymist.org/wiki/index.php?title=RC1_errata) > > ** Major errors: these items prevent parts of the unmodified board from > working. > * Connect P[15:8] instead of P[7:0] on the video decoder chip U21 > * The installed IR detectors do not work. This is not a PCB problem and it > can > be solved by replacing the IR detector module with one from another source. > * The MIDI optoisolator is not suitable. Replace it with a > 6N138S/6N138_X007 > and lower R54 to 120 ohms. Connect pin 8 to 3.3V and leave pin 7 > unconnected. > * For USB to work reliably, 15K pull down resistors must be installed on > the > D+ and D- lines of each USB port (between the 24 ohm resistors and the > ports). > Add the possibility to make them pull-up resistors to 3.3V (i.e. add > placeholders for pull-ups) so the USB ports could work in device mode with > a > small PCB modification. > > ** Minor errors and improvements : these items do not alter the > functionality > of the board. > * Add 1K pull-down resistor on ETH_RESET_N (specification says reset should > be > low during power-up) > * Add 1K pull-down resistor on VIDEOIN_RESET_N (the application schematics > includes external POR circuitry) > * Add notch to mark pin 1 of J3 on silkscreen > * Use red, green and blue connectors for J18 > * We might want a larger soldered area under the pads of U10 > * Indicate "+/- 5%" and pinout (positive in the middle) near J11 on > silkscreen > * Add a 5V supply pin on the GPIO expansion header > * Add a test point at the output of the MIDI optoisolator > * Add test points on the USB signals (3.3V FPGA side: VP, VM, RCV, OE) > * To reduce audio output noise, power the LM4550 analog supply through an > additional TPS76301 set to 4.3V. > * In order to be able to detect board revisions, route 4 FPGA I/O pins to > placeholders for 0402 pull-up resistors. The combination of placed and non- > placed resistors encodes the board revision. The RC2 board should be > encoded > as 0001 (ie place only 1 resistor) to distinguish it from RC1 which does > not > have any resistor. > _______________________________________________ > http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org > IRC: #milkym...@freenode > Webchat: www.milkymist.org/irc.html > Wiki: www.milkymist.org/wiki > -- Best Regards Adam Wang http://www.nanonote.cc
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