SoM-iMX6U User Manual
Revision 1.00 © 2016
- 7 -
2.4
External Connections
The SoM-iMX6U connects to a carrier board containing its connectors, power supply and any expansion
I/O, through a standard ENIG-plated (Electroless Nickel Immersion Gold) SODIMM 144 pin connection
(top half shown below).
The SoM model will fit in any standard 144-pin SODIMM socket. These connections are designed to be
compatible with all EMAC 144-pin SoM products. See EMAC SoM 144-pin SODIMM pin-out Specification
to see how other 144-pin SoMs pin-outs line up with the SoM-A5D35’s pin-out.
The use of the SODIMM form-factor for EMAC’s SoMs is a sound choice that has been proven rugged
and reliable in the laptop market.
2.4.1
External Bus
SODIMM
Pin#
SoM
Pin Name
Processor
Pin Name(s)
Description
100
GP_CS1
CSI_MCLK
/EIM_CS0#
General Purpose Processor Chip Select CS0
98
GP_CS2
~NAND READY
/EIM_CS1#
General Purpose Processor Chip Select CS1
108
GP_CS3
LCD_CLK
/EIM_CS2#
General Purpose Processor Chip Select CS2
16
~OE
CSI_PIXCLK
Read Signal
83
~WR
CSI_VSYNC
Write Signal
6
~RST_IN
~SOM_RST_OUT
Processor Reset
43
~RST_OUT
~
POR
Processor Reset
85
Flash WP
Serial Flash WP
Serial Flash Write Protect
26,35,33,31,
28,109,111,
113
A0-A7
A0-A7
Address Bus
29,27,25,22,
23,21,19,20,
8,24,34,70,
77,81,84,86
D0-D15
D0-D15
Data Bus
