TechNexion EDM1-IMX6PLUS, Hardware Manual

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EDM1-IMX6PLUS HARDWARE MANUAL
– VER 1.00 – NOV 16 2016
Page 57 of 83
3.14. I
2
C Bus
The EDM1-IMX6PLUS I
2
C interfaces are implemented with the i.MX6 integrated I
2
C controller. There are
two general purpose I 2 C interfaces and one I 2 C interface dedicated towards display and system
management functions.
The following features are supported:

Compliance with Philips I
2
C specification version 2.1

Multiple-master operation

Support for standard mode (up to 100K bits/s) and fast mode (up to 400K bits/s)

Arbitration-lost interrupt with automatic mode switching from master to slave
For additional details, please refer to the “I2C Controller (I2C)” chapter of the “i.MX6 Reference Manual”.
3.14.1. Display and System Management Purpose I
2
C Bus
The I
2
C interface that manages display and system management functions is available at two instances.
Table 32 - Display and System Management Purpose I
2
C Bus Signal Description
EDM
PIN
i.MX6
BALL PAD NAME Signal V I/O Description
73 H20 EIM_D21 I2C1_SCL 5V I/O
Display ID DDC data line
used for HDMI detection. If
not used this can be assigned
to General Purpose I
2
C bus
clock line
75 G23 EIM_D28 I2C1_SDA 5V I/O
Display ID DDC data line
used for HDMI detection. If
not used this can be assigned
to General Purpose I
2
C bus
data line
NOTE: The 5.0V I
2
C signals are normally connected towards the external HDMI display interface and
should not be connected to other parts of the system on an EDM carrier board if possible.
NOTE: The 5.0V I
2
C signals have an TX0102DCUR voltage level shift incorporated.
EDM
PIN
i.MX6
BALL PAD NAME Signal V I/O Description
37 G23 EIM_D28 I2C1_SDA 3V3 I/O
Display ID DDC data line used
for LVDS flat panel detection.
If not used this can be
assigned to General Purpose
I
2 C bus data line
39 H20 EIM_D21 I2C1_SCL 3V3 I/O
Display ID DDC clock line
used for LVDS flat panel
detection. If not used this can
be assigned to General
Purpose I
2 C bus clock line
NOTE: The 3.3V I
2
C signals are normally connected towards the LVDS display interface and smart
battery solutions and should not be connected to other parts of the system on an EDM carrier board if
possible.