Application Interfaces; U)Sim Interface; Pin Definition Of (U)Sim - Quectel RM520N-GL Hardware Design

4

Application Interfaces

The physical connections and signal levels of the module comply with the 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
⚫
Control and indication interfaces
⚫
Cellular/WLAN COEX
⚫
Antenna tuner control interface
⚫
Configuration pins

4.1. (U)SIM Interface

The (U)SIM interface circuitry meets ISO/IEC 7816-3, ETSI and IMT-2000 requirements. Both Class B
(3.0 V) and Class C (1.8 V) (U)SIM cards are supported.

4.1.1. Pin definition of (U)SIM

RM520N-GL has two (U)SIM interfaces, and supports dual SIM single standby.
Table 14: Pin Definition of (U)SIM Interface
Pin No. Pin Name
36 USIM1_VDD
34 USIM1_DATA
32 USIM1_CLK
30 USIM1_RST
66 USIM1_DET
RM520N-GL_Hardware_Design
interface*
I/O Description
PO Power supply for (U)SIM1 card
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
5G Module Series
DC Characteristics
USIM1_VDD
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
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