User's Guide

LM940 HW Design Guide
1VV0301352 Rev. 2 Page 53 of 68 2017-07-19
EMC Recommendations
EMC protection on the pins in the table below should be designed by application side
according to the customer’s requirement.
EMC Recommendations
Pin Signal I/O Function Type Comment
USB HS 2.0 Communication Port
38 USB_D+ I/O USB 2.0 Data Plus Analog
36 USB_D- I/O USB 2.0 Data Minus Analog
USB SS 3.0 Communication Port
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
SIM Card Interface 1
14 SIMRST1 O Reset output to an
external UIM1 card
1.8 / 2.85V
12 SIMCLK1 O Clock output to an
external UIM1 card
1.8 / 2.85V
10 SIMIO1 I/O Data connection with
an external UIM1
card
1.8 / 2.85V