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S1R72105
V
BUS
XPUENB
DP
DM
1) Connect the V
pin to the V
BUS
2) The XPUENB outputs LOW by inputting 5V in V
USBCommon register (0Ah).
XPUENB is asserted when USB is ready for operation after checking that V
3) How to handle DP and DM pins.
Add Zener diode for electrostatic protection onto the connector side.
Add 24 Ω resistor for adjusting impedance.
Add 22pF condensor for adjusting edge rate.
Add a diode onto the pin side to protect from a short in the wiring of the USB cable.
Rev.1.0
100kΩ
GND
5.6kΩ
3.3V
3.3V
GND GND
GND
GND
Fig.2. USB Connection Diagram
pin of the connector by providing chattering prevention circuit.
BUS
GND
3.3V
10kΩ
2SA
24Ω
24Ω
GND
pin and setting the EnPullUp(bit1) bit of the
BUS
EPSON
S1R72105 Technical Manual
USB Connector
Series B Receptacle
V
BUS
D-
D+
GND
GND
is HIGH (5V).
BUS
89
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