Quectel EC21-A - Application Interfaces

LTE Standard Module Series
EC21_Series_Hardware_Design
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Application Interfaces
3.1. General Description
EC21 series module is equipped with 80 LCC pins plus 64 LGA pins that can be connected to cellular
application platform. The subsequent chapters will provide detailed descriptions of the following
interfaces/functions.
 Power supply
 (U)SIM interface
 USB interface
 UART interfaces
 PCM and I2C interfaces
 SD card interface
 Interfaces for WLAN & Bluetooth applications
 ADC interface
 Network status indication
 SGMII interface
 USB_BOOT interface