✎
The USB3320 ULPI transceiver circuit has a Micrel MIC2544 high-side
programmable current limit switch (U100). This switch has an open-drain output
fault flag on pin 2, which turns on red LED DS37 if over current or thermal shutdown
conditions are detected.
Note: As shown in the following figure, the shield for the USB 2.0 type-A
connector (J308) can be tied to GND by a jumper on header J300 pins 1-2 (see
Default Jumper and Switch Settings). The USB shield can optionally be connected
through a series capacitor to GND by installing a capacitor (body size 0402) at
location C2762 and inserting a jumper across pins 2-3 on header J300.
Figure: USB3320 USB2.0 Connector J308 Shield Connection Options
To Next Page
Loading...
