Quectel L80 EVB Guia do Utilizador descarregar pdf (Página 19)

UMTS/HSPA

UC20 EVB User Guide

UC20_EVB_User_Guide Confidential / Released 18 / 25

Table 4: Pin Assignment-SIM Card Holder J502

3.4. USB Device Interface

UC20 EVB_V1.01 provides a USB 2.0 High Speed interface. It is used for AT command, data transfer and

firmware upgrading.

J601

USB

Figure 8: USB Interface

Pin No.

Signal Name

I/O

Function

SIM_VDD

Supply voltage U=3V or 1.8V for SIM1

card, generated by the module.

SIM_RST

SIM1 card reset..

SIM_CLK

SIM1 card clock.

4,8

GND

Ground

VPP

Not connected.

SIM_DATA

I/O

Data line, bi-directional

SIM_PRESENCE

SIM1 card detection.

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