LTE Standard Module Series
EC25 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
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
EC25 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 150Mbps (DL)/50Mbps (UL) for 4G network
Support VLAN tagging
Support IEEE1588 and Precision Time Protocol (PTP)
Can be used to connect to external Ethernet PHY like AR8033, or to an external switch
Management
interfaces
support dual voltage 1.8V/2.85V
The following table shows the pin definition of SGMII interface.
Pin Name
Pin No.
Description
ADC0
45
General purpose analog to digital converter
ADC1
44
General purpose analog to digital converter
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
NOTES
