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⚫
Keep (U)SIM card signals away from RF and VBAT traces.
⚫
Make sure the ground between the module and the (U)SIM card connector is short and wide. Keep
the trace width of ground and USIM_VDD not less than 0.5 mm to maintain the same electric
potential.
⚫
To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away from each other and
shield them with surrounded ground.
⚫
For better ESD protection, it is recommended to add an ESD protection device of which parasitic
capacitance should be less than 50 pF. 22 Ω resistors should be added in series between the
module and the (U)SIM card connector to facilitate debugging. The (U)SIM peripheral circuit should
be close to the (U)SIM card connector.
⚫
The pull-up resistor on USIM_DATA trace can improve anti-jamming capability with the application
of long layout trace and sensitive occasions, and it should be close to the (U)SIM card connector.
4.2. USB Interface
The module provides one integrated USB (Universal Serial Bus) interface which complies with the USB
3.0 and 2.0 specifications and supports super speed (5 Gbps) mode on USB 3.0 and high speed
(480 Mbps) and full speed (12 Mbps) modes on USB 2.0. The USB interface is used for AT command
communication, data transmission, GNSS NMEA sentence output, software debugging, firmware
upgrade, and voice over USB*.
Table 13: Pin Definition of USB Interface
Pin Name
Pin No.
USB_VBUS
32
USB_DP
34
USB_DM
33
USB_SS_TX_M
37
USB_SS_TX_P
38
USB_SS_RX_P
40
USB_SS_RX_M
41
USB_ID*
36
OTG_PWR_EN*
143
EG060K &EG120K _Series_Hardware_Design
103
I/O
Description
PI
USB connection detect
AIO
USB 2.0 differential data (+)
AIO
USB 2.0 differential data (-)
AO
USB 3.0 super-speed transmit (-)
AO
USB 3.0 super-speed transmit (+)
AI
USB 3.0 super-speed receive (+)
AI
USB 3.0 super-speed receive (-)
DI
USB ID detect
DO
OTG power control
LTE-A Module Series
Comment
Typical 5.0 V
Comply with USB 2.0
specifications.
Require differential
impedance of 90 Ω.
Comply with USB 3.0
specifications.
Require differential
impedance of 90 Ω.
-
-
1.8 V
If unused, keep it open.
-
44 /
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