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EVB User Guide

M80_EVB_UGD_V1.0 - 15 -

3.4. SIM card interface

3.4.1 SIM1 card interface

3 4

Figure 7: SIM1 card interface

Table 7: Pins of SIM card interface

Signal

I/O

Description

Note

SIM1_PRESENCE

SIM card detect

SIM1_CLK

SIM card clock

SIM1_RST

SIM card reset

SIM1_VDD

SIM power

GND

VPP

SIM card power output

SIM1_DATA

I/O

SIM card data I/O

SIM_DETECT

Pulled down GND with external

circuit. When the tray is present,

pin 4 is connected to pin 8.

Quectel

Confidential

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Sim2 M80 Guía de usuario Pagina 16