UMTS/HSPA Module Series
UC20 EVB User Guide
UC20_EVB_User_Guide Confidential / Released 15 / 30
UC20 EVB provides a Micro-USB receptacle J601 to connect a host device. The USB data lines USB_DP
and USB_DM are connected directly to the UC20-TE-A and UC20 Mini PCIe.
Figure 7: Circuit of USB Interface
Table 4: Pin Assignment of USB Device Interface J601
3.3. Audio Interface
UC20-TE-A and UC20 Mini PCIe just provide digital audio interface (PCM). UC20 EVB equips an external
audio codec called NAU8814. Figure 8 shows the audio codec circuit.
The UC20 EVB provides three analog audio interfaces J402, J404, J401. This chapter gives a detailed
introduction on these analog audio interfaces.
J601 Pin
Pin Name
Function
1
USB_VBUS
This pin is used for USB detection.
2
USB_DM
USB serial differential bus (minus).
3
USB_DP
USB serial differential bus (positive).
4
USB_ID
Reserved.
5
GND
GND for USB interface.
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