Sgmii Interface - Quectel EC21 Series Hardware Design

Table 17: Pin Definition of ADC Interfaces
Pin Name Pin No.
ADC0 45
ADC1 44
The following table describes the characteristic of ADC function.
Table 18: Characteristic of ADC
Parameter
ADC0 Voltage Range
ADC1 Voltage Range
ADC Resolution
NOTE
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.
EC21_Series_Hardware_Design
Description
General-purpose ADC interface
General-purpose ADC interface
Min.
0.3
0.3
-
LTE Standard Module Series
Comment
If unused, keep them open.
Typ. Max.
- VBAT_BB
- VBAT_BB
15 -
Unit
V
V
bits
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