Quectel EG91-NAXD - 3.1. General Description

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 21 / 106
3 Application Interfaces
3.1. General Description
EG91 series module is equipped with 62-pin 1.1mm pitch SMT pads and 44-pin ground/reserved pads
that can be connected to customers’ cellular application platforms. Sub-interfaces included in these pads
are described in detail in the following chapters:
 Power supply
 (U)SIM interfaces
 USB interface
 UART interfaces
 PCM and I2C interfaces
 SPI interface
 Status indication
 USB_BOOT interface