![]() ![]() D+, D- : The remaining two pins on USB connector will be D+ and D-, but we don't require these.ĩ.Hence, this continuity confirms which pin is Vbus. Hence, luckily the Vdd pin of ADNS-2610 was directly routed to USB 5V pin (with little series resistance of course, but it shows continuity). The Vbus : ADNS-2610 can be powered by 5V DC.Also, the shield pin is connected to GND, hence continuity test will pass for these pins too. Additionally, you can test the continuity between the GND pin of the ADNS-2610 (we already have pinout in datasheet) and the USB connector pin connected to ground plane. And the pins connected to this ground plane are easily identifiable. The Ground Plane : The largest trace or the largest portion of area occupied on PCB is a ground plane.Try continuity test between the pads of USB connector and ADNS-2610 : Our aim is to first identfy the Vbus and GND pins, so that we can power up the entire circuitry. Shield : The outer shielding of USB cable, connected to GND.Not applicable in our case, hence not there on PCB. Normally, USB 2.0 cables will have 4/5/6 wires sodered to PCB : Set your Digital Multi Meter (DMM) to continuity mode. Hence, a little more effort is required to identify the power supply (V+ and GND). ![]() But, as I have already mentioned previously, that the mouse was missing the USB cable. It is easy to identify the power supply by from the USB cable wires colors. Step 3 : Identify Power supply and Pinout (Digital Multi Meter is your best friend) ![]()
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