UMTS/HSPA+/LTE Standard Module Series
Mini PCIe-C EVB User Guide
Mini_PCIe-C_EVB_User_Guide 25 / 39
Table 8: Pin Definition of J403
The following figure shows the sketch design of the CTIA audio plug which suits the audio jack on Mini
PCIe-C EVB.
2
1
MIC
GND
SW
SPK_R
SPK_L
3
4
32
Ω
32
Ω
Figure 20: Sketch Design of CTIA Audio Plug
4.4. (U)SIM Interface (J303)
The Mini PCIe-C EVB provides a 6-pin push-push type (U)SIM interface J303 which supports 1.8V/3.0V
(U)SIM card. Its reference circuit design is shown as below.
Pin No.
Pin Name
Description
1
MIC
Microphone input
2
AGND
Dedicated GND for audio
3
SPK_R
Right channel of stereo audio output
4
SPK_L
Left channel of stereo audio output
5, 6
NC
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