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Maxim > Design Support > Technical Documents > Application Notes > Automotive > APP 5535
Maxim > Design Support > Technical Documents > Application Notes > High-Speed Interconnect > APP 5535
Maxim > Design Support > Technical Documents > Application Notes > Interface Circuits > APP 5535
Keywords: video, audio, serializer, deserializer, SerDes, GMSL, HDCP, high speed interconnect,
automotive, communication, UART, I2C, control channel, LCD display, backup camera
APPLICATION NOTE 5535
FAQs about the Control Channel and Operation of
Serializer/Deserializer Devices
By: Wai Phyo
Apr 22, 2013
Abstract: This application note addresses frequently asked questions (FAQs) about the control channel
and operation of gigabit multimedia serial link (GMSL) serializer/deserializer (SerDes) devices. These
products transport video and control information over low-cost shielded twisted pair (STP) or coax cables
in vehicles. These questions are related to the serial link on these parts and the way it handles video
data and control information.
Table of Contents
Operation
Compact GMSL Devices
When the MAX9272 double output feature is not supported in the serializer, the data defaults to
single input. What does this mean?
When the MAX9272 receives data from the MAX9271, do BWS and DBL require the same settings
on both devices? For example, is it possible that the MAX9271 inputs data in single mode and the
MAX9272 outputs data in double mode?
Why does the MAX9272 have two HV outputs: HS0/VS0 and HS1/VS1?
When using the MAX9271 in double mode, do I apply twice the frequency of PCLK in single mode
to PLCLKIN to keep same transfer rate within single mode?
Does the MAX9271/MAX9272's description "25MHz to 75MHz clock for 15-bit double input/output"
mean that the data transfer rate in double mode is half of the clock, 12.5M to 37.5M word/sec?
Is there a way for the serializer to drive a GPIO in a deserializer? What is the H/V encoding feature
and what are its benefits?
GMSL Devices
What is the recommended number for the error threshold (ERRTHR) register setting in a GMSL
device?
What does Auto Error Reset (AUTORST) do and when is it needed?
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