
REL0.2
Page 27 of 58
i.MX8M SMARC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
SMARC
Pin No.
SMARC Edge
Signal Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
S85
NC.
NA
NA
NC.
Note: Optionally connected to
PCIE2_REFCLK_n Clock Source
S87
NC.
PCIE2_RX0_P/
A21
I, PCIe
NC.
Note: Optionally connected to PCIE2
Receiver Positive.
S88
NC.
PCIE2_RX0_N/
B22
I, PCIe
NC.
Note: Optionally connected to PCIE2
Receiver Negative.
S90
NC.
PCIE2_TX0_P/
B24
O, PCIe /
0.22uF AC Couple
NC.
Note: Optionally connected to PCIE2
Transmitter Positive.
S91
NC.
PCIE2_TX0_N/
C25
O, PCIe /
0.22uF AC Couple
NC.
Note: Optionally connected to PCIE2
Transmitter Negative.
2.7.5
MIPI CSI Camera
The i.MX8M CPU supports two 4-lane camera interfaces, the CSI-2 Rx Controller Core implements all three layers
defined by the CSI-2 Specification: Pixel to Byte Packing, Low Level Protocol, and Lane Management. The D-PHY
interface of the CSI-2 Rx Controller Core supports PHY Protocol Interface (PPI) compatible MIPI D-PHYs. The Local
Interface is an easy to use pixel-based interface that supports 1 to 4 virtual channels and all data types. The Local
interface runs at the User Interface clock rate for all implementations. The CSI-2 Rx Controller Core takes care of all
packet formatting details and transmission over the MIPI bus. The i.MX8M SMARC SOM supports one two lane and
one four lane MIPI CSI camera interface via SMARC Edge connector along with the other controlling signals. Here CSI1
all signals are supported near SMARC edge connector whereas CSI0 lane0 and lane1 are connected to SMARC edge
connector and lane 2 and 3 are connected to expansion connector.
For more details on MIPI CSI0 SMARC pinouts, refer below table:
SMARC
Pin No.
SMARC Edge
Signal Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
S5
I2C3_SCL
I2C3_SCL/
G8
O, 1.8V CMOS/
4.7K PU
MIPI CSI0 I2C Clock.
S6
MCLK
SAI1_MCLK/
A3
O, 1.8V CMOS
Master Clock for Camera.
S7
I2C3_SDA
I2C3_SDA/
E9
IO, 1.8V CMOS/
4.7K PU
MIPI CSI0 I2C Data.
S8
MIPI_CSI1_CLK_P
MIPI_CSI1_CLK_P/
B22
I, MIPI
MIPI CSI0 differential Clock
positive.
S9
MIPI_CSI1_CLK_N
MIPI_CSI1_CLK_N/
A22
I, MIPI
MIPI CSI0 differential Clock
negative.
S11
MIPI_CSI1_DATA0_P
MIPI_CSI1_DATA0_P/
B23
I, MIPI
MIPI CSI0 differential data lane 0
positive
S12
MIPI_CSI1_DATA0_N
MIPI_CSI1_DATA0_N/
A23
I, MIPI
MIPI CSI0 differential data lane 0
negative