LN920 HW Design Guide
1VV0301730 Rev. 1
Page 42 of 81
2021-08-11
Not Subject to NDA
Note:
Do not use any pull-up resistor on the RESET# line or any other
totem pole digital output. Using a pull-up resistor may cause latch-
up problems on the LN920 power regulator and incorrect module
operation.
The RESET# line must be connected only in an open-collector
configuration.
Below figure shows a simple circuit for this action.
Communication Ports
Below table summarizes all the hardware interfaces available of the LN920 module.
Interface
LN920
USB
Super-speed USB 3.0 with high-speed USB 2.0
USIM
X2, dual voltage each (1.8V/2.85V)
Control Signals
W_DISABLE1#, GPS_DISABLE#, WOW#, WWAN_LED#
I2S
I2S
Antenna ports
2 for Cellular, 1 for GNSS
TBD
6.5.1.
USB Interface
The LN920 module includes super-speed USB 3.0 interface with high-speed USB 2.0
backwards compatibility. It is compliant with Universal Serial Bus Specifications,
Revision 3.0 and can be used for control and data transfers as well as for diagnostic
monitoring and firmware update.
The USB port is the main interface between the LN920 module and the host controlling
the modem hardware.
