User Guide

LM960 HW Design Guide
1VV0301485 Rev. 3 Page 41 of 74 2018-12-14
Warning – At power-up, LM960 success to enumerate SS_USB
interface. But if a hot-plug is attempted in case of SS_USB, then
LM960 may fail to enumerate SS_USB.
Information – According to the mini PCIe standard, TX/RX of SS USB
and PCIe share the same pin (Pin 23, 25, 31, 33) so that can not be
used at the same time. Currently PCIe interface is not supported but
will be enabled soon.
Below table lists the USB interface signals.
USB Interface Signals
PIN Signal I/O Function Type Comment
38 USB_D+ I/O USB 2.0 Data Plus Analog
36 USB_D- I/O USB 2.0 Data Minus Analog
33 USB_SS_RX_P I
USB 3.0 super-speed
receive – plus
Analog
31 USB_SS_RX_M I
USB 3.0 super-speed
receive
–
minus
Analog
25 USB_SS_TX_P O
USB 3.0 super-speed
transmit – plus
Analog
23 USB_SS_TX_M O
USB 3.0 super-speed
transmit
–
minus
Analog
Information – Even if USB communication is not used, it is still highly
recommended to place an optional USB connector on the application
board.
At least test points of the USB signals are required since the USB
physical communication is needed in the case of SW update.