EMAC SoM-iMX6U, User Manual, Page: 9 / 22

SoM-iMX6U User Manual
Revision 1.00 © 2016 - 8 -
2.4.2 JTAG
The SoM specification allows for access to the JTAG lines for the MCIMX6G1CVM05AA processor. These
connections are used for the I2S interface; custom software will need to be deployed to enable the JTAG
lines’ capability to debug software.
Processor JTAG
SODIMM
Pin#
SoM
Pin Name
Processor
Pin Name(s)
Description
139 JTAG_TCK JTAG_TCK
JTAG clock
137 JTAG_TDI JTAG_TDI
JTAG serial in
138 JTAG_TDO JTAG_TDO
JTAG serial out
140 JTAG_TMS JTAG_TMS
JTAG operation mode
112 JTAG_TRST ~JTAG_TRST
Test Reset Signal
2.4.3 One-Wire / I2C
The SoM specification calls for a one-wire port. Since the SoM-iMX6U does not have a one-wire port, this
line is not connected for One-
Wire
Operation. The
MCIMX6G1CVM05AA
processor does provide an I2C
bus and so these pins are dedicated to that function although they can also be used as GPIOs.
One-Wire / I2C Port
SODIMM
Pin#
SoM
Pin Name
Processor
Pin Name(s)
Description
116 LOCAL1W /SCL GPIO1_IO02 I2C Clock
88 SDA GPIO1_IO03 I2C Data