Headset Interface; Earphone Interface - Quectel SA800U-WF EVB User Manual

4.8.2. Headset Interface

SA800U-WF EVB provides one headset interface. The following figure shows a reference circuit design
for headset interface.
U0401A
MIC_BIAS2
AMIC2_P
AMIC2_M
CDC_HPH_R
CDC_HPH_L
CDC_HPH_REF
MBHC_HSDET_L
WCD9341
The following figure shows the 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.
SA800U-WF_EVB_User_Guide
R2
20K
C3 C4
C2
220 pF 220 pF 220 pF 220 pF
Figure 32: Reference Design for Headset Interface
2
3
5
Figure 33: Pin Assignment of Headset Interface
R1
2.2K
C5
ESD
1
J0433 6
4
Smart Module Series
6
1
3
5
2
4
J0433
D1 D2 D3 D4 D5
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