LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 51 / 94
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.
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.
NOTE
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