MSC SM2S-IMX8M User Manual
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Signal
Option
Availability
Pin Type
Signal Level
Pin on
i.MX8M
Pin name on
i.MX8M
Power
Toleranc
e
PU/PD
Description
USB1+
USB1-
1
I/O
USB
n.a.
n.a.
3.3V
Differential USB 2.0 data pairs
connected to USB hub. Can be
configured as host only.
2
I/O
USB
A10
B10
USB2_DP
USB2_DN
3.3V
Differential USB 2.0 data pairs
connected to SoC. Can be
configured as host only.
USB[2:4]+
USB[2:4]-
1
I/O
USB
n.a.
n.a.
3.3V
Differential USB 2.0 data pairs
connected to USB hub. Can be
configured as host only.
USB[2:3]_SSTX+
USB[2:3]_SSTX-
1
O
USB
n.a
n.a
3.3V
USB 3.0 transmit signal differential
pairs connected to USB hub. AC
coupled on module.
USB[2:3]_SSRX+
USB[2:3]_SSRX-
1
I
USB
n.a
n.a
3.3V
USB 3.0 receive signal differential
pairs connected to USB hub.
USB0_VBUS_DET
1 & 2
I
Analog
D14
USB1_VBUS
5V
external VBUS detection pin
USB0_OTG_ID
1 & 2
I
3.3V CMOS
M7
GPIO1_IO10
3.3V
PU 10k 3.3V USB host/client control select pin for
the USB controller on the module
USB0_EN_OC#
1 & 2
I/O OD
3.3V CMOS
L7
K6
GPIO1_IO12
GPIO1_IO13
3.3V
PU 10k 3.3V Host/client dependent enable signal
for USB power switch on the carrier
board.
USB1_EN_OC#
1
I/O OD
3.3V CMOS
n.a
n.a
3.3V
PU 10k 3.3V Multi-function signal for enabling
USB power and indicating an over-
current event.
2
I/O OD
3.3V CMOS
n.a
n.a
3.3V
PU 10k 3.3V Multi-function signal for enabling
USB power and indicating an over-
current event.
USB2_EN_OC#
1
I/O OD
3.3V CMOS
n.a.
n.a.
3.3V
PU 10k 3.3V Multi-function signal for enabling
USB power and indicating an over-
current event.