Application Interfaces; U)Sim Interface; Pin Definition Of (U)Sim - Quectel LTE-A Series Hardware Design

4

Application Interfaces

The physical connections and signal levels of EM121R-GL comply with PCI Express M.2 specification.
This chapter mainly describes the definition and application of the following interfaces/pins of the module:
⚫
(U)SIM interfaces
⚫
USB interface
⚫
PCIe interface
⚫
PCM interface*
⚫
Control and indication interfaces
⚫
Cellular/WLAN COEX interface*
⚫
Antenna tuner control interface*
⚫
Configuration pins

4.1. (U)SIM Interface

The (U)SIM interface circuitry meets ETSI and IMT-2000 requirements. Both Class B (3.0 V) and Class C
(1.8 V) (U)SIM cards are supported, and Dual SIM Single Standby function is supported.

4.1.1. Pin definition of (U)SIM

Table 13: Pin Definition of (U)SIM Interfaces
Pin No. Pin Name
36 USIM1_VDD
34 USIM1_DATA
32 USIM1_CLK
30 USIM1_RST
66 USIM1_DET
40 USIM2_DET*
EM121R-GL Hardware Design
I/O Description
PO (U)SIM1 card power supply
DIO, PU (U)SIM1 card data
DO, PD (U)SIM1 card clock
DO, PD (U)SIM1 card reset
DI, PU (U)SIM1 card hot-plug detect
DI, PU (U)SIM2 card hot-plug detect
LTE-A Module Series
EM121R-GL Hardware Design
DC Characteristics
1.8/3.0 V
USIM1_VDD
1.8/3.0 V
USIM1_VDD
1.8/3.0 V
USIM1_VDD
1.8/3.0 V
1.8 V
1.8 V
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