Quectel EC21 Series User Manual

LTE Standard Module Series
EC21_Series_Hardware_Design
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Table 17: Pin Definition of ADC Interfaces
The following table describes the characteristic of ADC function.
Table 18: Characteristic of ADC
Parameter Min. Typ. Max. Unit
ADC0 Voltage Range 0.3 - VBAT_BB V
ADC1 Voltage Range 0.3 - VBAT_BB V
ADC Resolution - 15 - bits
1. ADC input voltage must not exceed that of VBAT_BB.
2. It is prohibited to supply any voltage to ADC pins when VBAT power supply is removed.
3. It is recommended to use a resistor divider circuit for ADC application.
3.16. SGMII Interface
EC21 series module includes an integrated Ethernet MAC with an SGMII interface and two management
interfaces. The key features of the SGMII interface are shown below:

IEEE802.3 compliant

Support 10M/100M/1000M Ethernet work mode

Support maximum 10 Mbps (DL)/5 Mbps (UL) for 4G network

Support VLAN tagging

Support IEEE1588 and PTP

Can be used to connect to external Ethernet PHY like AR8033, or to an external switch

Management interfaces support dual voltage 1.8/2.85 V
The following table shows the pin definition of SGMII interface.
Pin Name Pin No. Description Comment
ADC0 45 General-purpose ADC interface
If unused, keep them open.
ADC1 44 General-purpose ADC interface
NOTE

Quectel EC21 Series Specifications

General

Brand	Quectel
Model	EC21 Series
Category	Control Unit
Language	English