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2010-10-12
, 23:11
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Posts: 309 |
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Joined on Oct 2010
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#2
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http://pinouts.ru/Slots/USB_pinout.shtml
Might already know this, but:
Pin----Name--------Cable color-----Description
1------VCC ------- Red --------- +5 VDC
2-------D- --------- White -------- Data -
3-------D+ -------- Green -------- Data +
4-------GND-------Black --------- Ground
It's not really clear, but I think as long as pins 2 and 3 are okay - you should be able to signal okay. But if pin 1 is the one that supplies the power, and power is needed to give a signal...
Last edited by tetris11_; 2010-10-12 at 23:15.
Might already know this, but:
Pin----Name--------Cable color-----Description
1------VCC ------- Red --------- +5 VDC
2-------D- --------- White -------- Data -
3-------D+ -------- Green -------- Data +
4-------GND-------Black --------- Ground
USB is a serial bus. It uses 4 shielded wires: two for power (+5v & GND) and two for differential data signals (labelled as D+ and D- in pinout). NRZI (Non Return to Zero Invert) encoding scheme used to send data with a sync field to synchronise the host and receiver clocks. In USB data cable Data+ and Data- signals are transmitted on a twisted pair. No termination needed. Half-duplex differential signaling helps to combat the effects of electromagnetic noise on longer lines. Contrary to popular belief, D+ and D- operate together; they are not separate simplex connections.
Last edited by tetris11_; 2010-10-12 at 23:15.
Thank you
Ed