UMTS/HSPA+/LTE Standard Module Series
Mini PCIe-C EVB User Guide
Mini_PCIe-C_EVB_User_Guide 22 / 39
Table 6: Pin Definition of J404
1)
Software functions of J401 and J404 are not supported.
4.3.2. Analog Audio Interfaces (J402/J403)
4.3.2.1. Handset Interface (J402)
The analog audio interface J402 is designed for handset. Its reference circuit design is shown as below.
ESD
33pF
ESD
ESD
ESD
33pF
33pF
33pF
33pF
33pF
10pF
10pF
10pF
10pF
10pF
10pF
FB
4
1
3
2
J101
J402
MICN
MICP
SPKN
SPKP
1
3
5
7
Figure 16: Reference Circuit Design for Handset Interface J402
Pin No.
Pin Name
Function
1
MICN
Negative microphone input
2
SPKN
Negative speaker output
3
SPKP
Positive speaker output
4
MICP
Positive microphone input
NOTE