Acer S2W 3300U Service Manual - Page 25

Pin # Source Pin Definition 1 VCC VBus 2 D- Data line 3 D+ Data line 4 GND GND 5.2.2 Signaling Levels Table 5-1 Summarizes the USB signaling levels. The signaling levels are described below and in the follow sections. Table 5-1 BUS State Differential "1" Differential "0" Data J State: Low Speed Full Speed Data K State: Low Speed Full Speed Idle State: Low Speed Fill Speed Signaling Levels Form Originating Driver At Receiver (D+)-(D-) > 200 mV and D+ or D- > VSE(min) (D+)-(D-) < 200 mV and D+ or D- > VSE(min) Differential "0" Differential "1" Differential "0" Differential "1" Differential "0" and D- > VSE(max.) and D+ < VSE(min.) Differential "1" and D+ > VSE(max.) and D- < VSE(min.)