MAX9263GCB/V+T Maxim Integrated, MAX9263GCB/V+T Datasheet - Page 42

• Manufacturer Part Number: MAX9263GCB/V+T
• Description: Serializers & Deserializers - Serdes GMSL Serializer w/HDCP Interface
• Manufacturer: Maxim Integrated

42
HDCP Gigabit Multimedia Serial
Link Serializer/Deserializer
Table 13. Start Mode Selection for Display Applications (CDS = Low)
outputs of the device remain high impedance. Entering
power-down mode resets the internal registers of the
device. In addition, upon exiting power-down mode, the
serializer/deserializer relatch the state of external pins
SSEN, DRS, AUTOS, and EQS.
The GMSL includes a low-speed configuration link to
allow control-data connection between the two devices
in the absence of a valid clock input. In either display or
camera applications, the configuration link can be used
to program equalizer/preemphasis or other registers
before establishing the video link. An internal oscillator
provides PCLKIN for establishing the serial configuration
link between the serializer and deserializer. Set CLINKEN
= 1 on the serializer to turn on the configuration link. The
configuration link remains active as long as the video
link has not been enabled. The video link overrides the
configuration link and attempts to lock when SEREN = 1.
Table 13 lists four startup cases for video-display
applications. Table 14 lists two startup cases for image-
sensing applications. In either video-display or image-
sensing applications, the control link is always available
after the high-speed data link or the configuration link is
established and the serializer/deserializer registers or
the peripherals are ready for programming.
CASE
1
2
3
4
(SERIALIZER)
AUTOS
High
High
Low
Low
Link Startup Procedure
Configuration Link Mode
POWER-UP STATE
SERIALIZER
Serialization
Serialization
Serialization
Serialization
disabled
disabled
enabled
enabled
(DESERIALIZER)
High
High
Low
Low
MS
For the video-display application, with a remote display
unit, connect the FC to the serializer and set CDS = low
for both the serializer and deserializer. Table 13 sum-
marizes the four startup cases based on the settings of
AUTOS and MS.
After power-up or when PWDN transitions from low to
high for both the serializer and deserializer, the serial
link establishes if a stable clock is present. The serial-
izer locks to the clock and sends the serial data to the
deserializer. The deserializer then detects activity on the
serial link and locks to the input serial data.
After power-up or when PWDN transitions from low to
high for both the serializer and deserializer, the deserial-
izer starts up in sleep mode, and the serializer stays in
standby mode (does not send serial data). Use the FC
and program the serializer to set SEREN = 1 to establish
a video link or CLINKEN = 1 to establish the configura-
tion link. After locking to a stable clock (for SEREN = 1)
or the internal oscillator (for CLINKEN = 1), the serializer
sends a wake-up signal to the deserializer. The deserial-
izer exits sleep mode after locking to the serial data and
sets SLEEP = 0. If after 8ms the deserializer does not
lock to the input serial data, the deserializer goes back to
sleep, and the internal sleep bit remains set (SLEEP = 1).
POWER-UP STATE
DESERIALIZER
In sleep mode
(SLEEP = 0)
Sleep mode
(SLEEP = 1)
(SLEEP = 0)
(SLEEP = 1)
Normal
Normal
Video-Display Applications
Both devices power up with serial
link active (autostart).
Serial link is disabled and the
deserializer powers up in
sleep mode. Set SEREN = 1 or
CLINKEN = 1 in the serializer to
start the serial link and wake up
the deserializer.
Both devices power up in normal
mode with the serial link disabled.
Set SEREN = 1 or CLINKEN = 1 in
the serializer to start the serial link.
The deserializer starts in sleep
mode. Link autostarts upon seri-
alizer power-up. Use this case
when the deserializer powers up
before the serializer.
Case 2: Standby Start Mode
LINK STARTUP MODE
Case 1: Autostart Mode