REL 1.2
Page 21 of 56
i.MX6 SODIMM SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.6.11
HDMI Interface
i.MX6 SODIMM SOM supports one HDMI display port (Ver. 1.4) on SODIMM Edge connector. HDMI is a compact
audio/video interface for transmitting uncompressed digital video data and uncompressed/compressed digital audio
data. HDMI is electrically compatible with the signals used by DVI and so no signal conversion is necessary, nor is
there a loss of video quality when a DVI-to-HDMI adapter is used.
i.MX6
CPU’s HDMI TX controller
with integrated PHY is used for HDMI interface which can support video formats up
to 1080p at 60Hz and 720p/1080i at 120Hz. It can also support CEC interface & HDCP. i.MX6
CPU’s HDMI TX PHY
output is directly connected to SODIMM Edge connector HDMI port. Also i.MX6 CPU supports HDMI Hot plug detect
& HDMI CEC and connected to SODIMM Edge pins 25 & 10 correspondingly.
i.MX6
CPU’s I2C1 interface
on SODIMM edge can be used as HDMI DDC interface. When HDCP is enabled, a
dedicated I2C controlled by the HDMI PHY should be used to exchange the HDCP encryption key & must sync several
times per second (not like a common I2C) and so i.MX6 I2C1 interface pins should be configured as HDMI_DDC.
Make sure to use suitable level shifter and driver to interface the I2C with the HDMI monitor since i.MX6
CPU’s I2C
cannot operate at the 5 V required by HDMI EDID. In addition, ESD protection must be used on all HDMI single-
ended and differential signals mounted near the HDMI connector. CM2020 from ON semiconductor or similar part
could be considered for ESD protection and I2C level conversion.
For more details, refer SODIMM Edge connector pins 18, 19, 21, 22, 23, 24, 25, 26, 28, 29, & 31 on
Note: Customers who develop products using HDMI need to work with DCP (http://www.digital-cp.com/licensing) to
get the HDCP license and related device keys.
Note: i.MX6 Duallite and i.MX6 Solo CPU supports only one IPU and so at any time only two display interfaces
(including LVDS, HDMI & Parallel RGB) can be supported.
2.6.12
I2S Audio Interface
i.MX6 SODIMM SOM supports one I2S/SSI audio interface port on SODIMM Edge connector.
i.MX6 CPU’s AUDMUX4
port is used for audio interface which provides a programmable interconnect device for voice, audio and
synchronous data routing between i.MX6 CPU’s SSI Controller and external audio/voice codec’s (
also known as
coder-decoders).
i.MX6 CPU’s SSI controller can be configured as AC’97 mode or I2S mode. I2S mode supports
sampling rate from 8KHz to 196KHz.
For more details, refer SODIMM Edge connector pins 61, 64, 67, 89 & 90 on
Note: If AUDMUX4 interface is not required on SODIMM edge, the same pins can be configured as uSDHC2 interface.