Quectel L80 EVB Guia do Utilizador descarregar pdf (Página 23)

UMTS/HSPA

UC20 EVB User Guide

UC20_EVB_User_Guide Confidential / Released 22 / 25

3.7. Status LEDs

UC20 EVB_V1.01 comprises several status LEDs. Figure 13 shows the position of LEDs.

D103

D101

D104

D102

Figure 13: LEDs

Table 7: Description of LEDs

3.8. Analog Audio Interface

UC20 Module just provides digital audio interface (PCM). UC20 EVB_V1.01 equips an external audio

codec called NAU8814, which transfer PCM to analogy signal. There is one analogy audio interface at

UC20 EVB_V1.01. Analogy signal could be input and output via RJ11 or audio jack. Figure 14 shows

audio codec circuit.

Reference

Description

D103

PWR_LED, power supply is ready.

D101

STATUS, indicates UC20 module is in ON or OFF status.

D104

NET_MODE, module works in 2G networks or 3G networks.

D102

NET_STATUS, indicate UC20 module’s working status.

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