MAX9249GCM/V+T Maxim Integrated Products, MAX9249GCM/V+T Datasheet - Page 25

• Manufacturer Part Number: MAX9249GCM/V+T
• Description: IC SERIALIZER GMSL LVDS 48TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX9249GCM/V+T

• Function: Serializer
• Data Rate: 2.5Gbs
• Input Type: LVDS
• Output Type: Serial
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Outputs: -
• Number Of Inputs: -

Table 8. Startup Selection for Video-Display Applications (CDS = Low)
setting its SLEEP = 1. The GMSL deserializer sleeps after
serial link inactivity or 8ms (whichever arrives first) after
setting its SLEEP = 1. See the Link Startup Procedure
section for details on waking up the device for different
FC and starting conditions.
The FC side device cannot enter into sleep mode. If an
attempt is made to program the FC side device for sleep,
the SLEEP bit remains 0. Use the PWDN input pin to
bring the FC side device into a low-power state.
The MAX9249 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 RXCLKIN_ for establishing the serial configura-
tion link between the MAX9249 and GMSL deserializer.
Set CLINKEN = 1 on the MAX9249 to turn on the con-
figuration 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.
CASE
1
2
3
4
(MAX9249)
AUTOS
High
High
Low
Low
______________________________________________________________________________________
Serializer with LVDS System Interface
POWER-UP
Serialization
Serialization
Serialization
Serialization
Configuration Link Mode
MAX9249
disabled
disabled
enabled
enabled
STATE
DESERIALIZER)
Gigabit Multimedia Serial Link
(GMSL
High
High
Low
Low
MS
POWER-UP STATE
DESERIALIZER
(SLEEP = 0)
Sleep mode
(SLEEP = 1)
(SLEEP = 0)
Sleep mode
(SLEEP = 1)
Table 8 lists four startup cases for video-display applica-
tions. Table 9 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 estab-
lished and the MAX9249/GMSL deserializer registers or
the peripherals are ready for programming.
For the video-display application, with a remote display
unit, connect the FC to the serializer (MAX9249) and set
CDS = low for both the MAX9249 and GMSL deserializer.
Table 8 summarizes 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 RXCLKIN_ is present. The
MAX9249 locks to RXCLKIN_ and sends the serial data
to the GMSL deserializer. The GMSL deserializer then
detects activity on the serial link and locks to the input
serial data.
Normal
Normal
GMSL
Both devices power up with serial link active
(autostart)
Serial link is disabled and the GMSL
deserializer powers up in sleep mode. Set
SEREN = 1 or CLINKEN = 1 in the MAX9249
to start the serial link and wake up the GMSL
deserializer.
Both devices power up in normal mode with
the serial link disabled. Set SEREN = 1 or
CLINKEN = 1 in the MAX9249 to start the
serial link.
GMSL deserializer starts in sleep mode.
Link autostarts upon MAX9249 power-up.
Use this case when the GMSL deserializer
powers up before the MAX9249.
Link Startup Procedure
Video-Display Applications
LINK STARTUP MODE
Case 1: Autostart Mode
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