Behavior Of The Ri; Sgmii Interface - Quectel EC21 Series Hardware Design

3.16. Behavior of the RI

AT+QCFG="risignaltype","physical" command can be used to configure RI behavior.
No matter on which port URC is presented, URC will trigger the behavior of RI pin.
NOTE
URC can be output from UART port, USB AT port and USB modem port by AT+QURCCFG command.
The default port is USB AT port.
In addition, RI behavior can be configured flexibly. The default behavior of the RI is shown as below.
Table 20: Behavior of the RI
State Response
Idle RI keeps in high level
URC RI outputs 120ms low pulse when new URC returns
The RI behavior can be changed by AT+QCFG="urc/ri/ring" command. Please refer to document [2]
for details.

3.17. SGMII Interface

EC21 includes an integrated Ethernet MAC with an SGMII interface and two management interfaces, key
features of the SGMII interface are shown below:

IEEE802.3 compliance

Full duplex at 1000Mbps

Half/full duplex for 10/100Mbps

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.
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