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MSC SM2S-IMX8M User Manual
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Signal
Pin Type
Signal
Level
Pin on
i.MX8M
Pin name on
i.MX8M
Power
Toleranc
e
PU/PD
Description
SER0_RTS#
O
1.8V CMOS
B7
UART3_RXD
1.8V
PU 10k 1.8V
UART handshake, ready to receive data
SER0_CTS#
I
1.8V CMOS
A6
UART3_TXD
1.8V
PU 10k 1.8V
UART handshake, ready to send data
SER1_TX
O
1.8V CMOS
D6
UART2_TXD
1.8V
PU 10k 1.8V
UART transmit data
SER1_RX
I
1.8V CMOS
B6
UART2_RXD
1.8V
PU 10k 1.8V
UART receive data
SER2_TX
O
1.8V CMOS
A4
ECSPI1_MOSI
1.8V
PU 10k 1.8V
UART transmit data
SER2_RX
I
1.8V CMOS
G22
EIM_D25
1.8V
PU 10k 1.8V
UART receive data
SER2_RTS#
O
1.8V CMOS
H21
EIM_D31
1.8V
PU 10k 1.8V
UART handshake, ready to receive data
(See Note 2 below - not available if SPI1 is
implemented)
SER2_CTS#
I
1.8V CMOS
D25
EIM_D23
1.8V
PU 10k 1.8V
UART handshake, ready to send data
(See Note 2 below - not available if SPI1 is
implemented)
SER3_TX
O
1.8V CMOS
W5
KEY_COL0
1.8V
PU 10k 1.8V
UART transmit data
(See Note 2 below - not available if SPI1 is
implemented)
SER3_RX
I
1.8V CMOS
V6
KEQ_ROW0
1.8V
PU 10k 1.8V
UART receive data
(See Note 2 below - not available if SPI1 is
implemented)
Note 1:
By default, SER0_RX/TX carries the Debug console output of U-Boot and Linux, typically at 115200Bd/8N1. The same serial signals
(level-shifted to 3.3 V) also connect to the on-board Serial Debug connector, see also chapter 5.6.2. So for access to the serial
Console of U-Boot / Linux, either one connection can be used as appropriate.
Note 2:
In case SPI1 is implemented on the module, only SER0 (4-Wire), SER1 (2-Wire) and SER2 (2-Wire) are available. The unused pins
may be left unconnected.