Quectel SA800U-WF, Руководство пользователя

Страница: 41 / 64

Smart Module Series
SA800U-WF_EVB_User_Guide 40 / 63
4.8.2. Headset Interface
SA800U-WF EVB provides one headset interface. The following figure shows a reference circuit design
for headset interface.
ESD
MIC_BIAS2
AMIC2_P
CDC_HPH_R
CDC_HPH_L
CDC_HPH_REF
MBHC_HSDET_L
R1
2
6
5
3
4
1
C3 C4 C5
D1 D2 D3 D4
AMIC2_M
C2
R2
D5
WCD9341
U0401A
J0433
220 pF 220 pF 220 pF 220 pF
20K
2.2K
Figure 32: Reference Design for Headset Interface
The following figure shows the pin assignment of headset interface.
J0433
1
6
4
2
3
5
Figure 33: Pin Assignment of Headset Interface
4.8.3. Earphone Interface
SA800U-WF EVB provides one earphone interface and the earphone is soldered onto the SA800U-WF
EVB via test point U0403. The following figure shows a reference circuit design for earphone interface.