Embedian SMARC-iMX8M Series, User Manual, Page: 41 / 174

Embedian, Inc.
41
SMARC-iMX8M Computer on Module User’s Manual v.1.0
2.1.8.1 USB Signals
The table below shows the USB0 related signals.
Edge Golden
Finder
Signal Name
Direction Type
Tolerance
Description
USB[0:1]+
USB[0:1]‐
Bi‐Dir USB Differential US 2.0 Data Pair
USB[0:3]_EN_OC# Bi‐Dir
OD
CMOS
3.3V
Pulled low by Module OD driver to disable
USB0 power.
Pulled low by Carrier OD driver to indicate
over‐current situation.
A 10k pull‐up is present on the Module to a
3.3V rail. The pull‐up rail may be switched off
to conserve power if the USB port is not in
use. Further details may be found in Section
2.1.8.2 USBx_EN_OC# Discussion below.
USB0_VBUS_DET
USB3_VBUS_DET
Input USB VBUS 5V USB host power detection, when this port is
used as a device.
USB0_OTG_ID Input CMOS
3.3V
USB OTG ID input, active high.
USB[2:3]SSRX‐
USB[2:3]SSRX+
Input USB SS Receive signal differential pairs for
SuperSpeed USB data Coupling caps for RX
pairs are
off‐Module (on Carrier Board)
USB[2:3]SSTX‐
USB[2:3]SSTX+
Output USBSS Transmit signal differential pairs for
SuperSpeed USB data Coupling caps for RX
pairs are
on‐Module