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M80 EVB User Guide

M80_EVB_User_Guide_V1.2 - 22 -

Figure 19: Pins of SIM1 card cassette

Table 7: Pins of SIM card interface

Signal

I/O

Description

Note

GND

VPP

Not connected

SIM1_DATA

I/O

SIM1 card data I/O

SIM1_CLK

SIM1 card clock

SIM1_RST

SIM1 card reset

SIM1_VDD

SIM1 power

Pulled down to GND with external

circuit. When the SIM card is

inserted, pin 7 is connected to pin 8.

SIM1_PRESENCE

SIM1 Card detect

3.4.2. SIM2 card interface

In order to be compatible with further application, M80 reserves an SIM IC and SIM2 cassette in

the EVB board. The schematic of SIM IC is same as SIM2 card. The SIM2 card interface does not

support SIM card detection. The following picture shows the schematic and test points.

Quectel

Confidential

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