Users Manual

LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design
62
/ 130
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.
Table 19: Pin Definition of SGMII Interface
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
Pin Name Pin No. I/O Description Comment
NOTES