MAX9249GCM/V+T Maxim Integrated Products, MAX9249GCM/V+T Datasheet - Page 27

• 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: -

Figure 24. State Diagram, CDS = High (Camera Application)
After power-up or when PWDN transitions from low to
high, the remote device (GMSL deserializer) starts up in
sleep mode. The high-speed link establishes automati-
cally after MAX9249 powers up with a stable RXCLKIN_
and sends a wake-up signal to the GMSL deserializer.
Use this mode in applications where the GMSL deserial-
izer powers up before the MAX9249.
For image-sensing applications, connect the FC to the
GMSL deserializer and set CDS = high for both the
MAX9249 and GMSL deserializer. The GMSL deserial-
izer powers up normally (SLEEP = 0) and continuously
tries to lock to a valid serial input. Table 9 summarizes
both startup cases, based on the state of the MAX9249
AUTOS pin.
After power-up, or when PWDN transitions from low to
high, the MAX9249 locks to a stable RXCLKIN_ and
sends the high-speed data to the GMSL deserializer. The
GMSL deserializer locks to the serial data and outputs
the video data and clock.
After power-up or when PWDN transitions from low to
high, the MAX9249 starts up in sleep mode. To wake up
the MAX9249, use the FC to send a GMSL protocol UART
ALL STATES
SLEEP = 1
AUTOS PIN
PWDN = LOW OR
SETTING
HIGH
LOW
POWER-OFF
SLEEP
______________________________________________________________________________________
Case 4: Remote Side in Sleep Mode
Image-Sensing Applications
Serializer with LVDS System Interface
SEREN
1
0
POWER-UP VALUE
WAKE-UP SIGNAL
POWER-DOWN
REVERSE LINK
PWDN = HIGH,
AUTOS = HIGH
POWER-OFF
POWER-ON,
FOR > 8ms
SLEEP = 1
OR
Case 1: Autostart Mode
SLEEP
0
1
Case 2: Sleep Mode
PWDN = HIGH,
AUTOS = LOW
POWER-ON
SLEEP = 0,
WAKE-UP
SLEEP = 1
Gigabit Multimedia Serial Link
RXCLKIN_ RUNNING
LINK LOCKING
SEREN = 1,
SLEEP = 0,
SEREN = 0
VIDEO
NO RXCLKIN_
SEREN = 0 OR
VIDEO LINK
VIDEO LINK
UNLOCKED
LOCKED
POWER-ON
frame containing at least three rising edges (e.g., 0x66),
at a bit rate no greater than 1Mbps. The low-power wake-
up receiver of the MAX9249 detects the wake-up frame
over the reverse control channel and powers up. Reset
the sleep bit (SLEEP = 0) of the MAX9249 using a regular
control channel write packet to power up the device fully.
Send the sleep bit write packet at least 500Fs after the
wake-up frame. The MAX9249 goes back to sleep mode
if its sleep bit is not cleared within 5ms (min) after detect-
ing a wake-up frame.
The MAX9249/GMSL deserializer link includes a PRBS
pattern generator and bit-error verification function. Set
PRBSEN =1 (0x04 D5) first in the MAX9249 and then the
GMSL deserializer to start the PRBS test. Set PRBSEN
=0 (0x04 D5) first in the GMSL deserializer and then the
MAX9249 to exit the PRBS self-test. The GMSL deserial-
izer uses an 8-bit register (0x0E) to count the number of
detected errors. The control link also controls the start
and stop of the error counting. During PRBS mode, the
device does not count decoding errors and the GMSL
deserializer ERR output reflects PRBS errors only. Refer
to the respective GMSL deserializer data sheet for more
details.
IDLE
CLINKEN = 0 OR
CLINKEN = 1
SEREN = 1
VIDEO LINK
OPERATING
NO RXCLKIN_
SEREN = 0 OR
Applications Information
CLINKEN = 0 OR
LINK STARTED
SEREN = 1
PRBSEN = 0
PRBSEN = 1
CONFIG
CONFIG LINK
CONFIG LINK
UNLOCKED
VIDEO LINK
PRBS TEST
LOCKED
Self-PRBS Test
CONFIG LINK
OPERATING
REGISTERS
PROGRAM
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