Quectel EC25 series, Проектирование аппаратного обеспечения

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LTE Module Series
EC25 Mini PCIe Hardware Design
EC25_Mini_PCIe_Hardware_Design Confidential / Released 14 / 42
3
Application Interface
3.1. General Description
The physical connections and signal levels of EC25 Mini PCIe comply with PCI Express Mini CEM
specifications. This chapter mainly describes the following interface
s’ definition and application of EC25
Mini PCIe:

Power supply

USIM card interface

USB interface

UART interface

PCM&I2C interfaces

Control signals

Antenna interface
3.2. EC25 Mini PCIe Interface
3.2.1. Definition of Interface
The following tables show the pin definition and description of EC25 Mini PCIe on the 52-pin application.
Table 3: Definition of I/O Parameters
Type Description
IO Bidirectional
DI Digital input
DO Digital output
OC Open collector
PI Power input
PO Power output
Quectel
Confidential