MAX9268GCM/V+ Maxim Integrated Products, MAX9268GCM/V+ Datasheet - Page 26

• Manufacturer Part Number: MAX9268GCM/V+
• Description: IC SERIALIZER GMSL LVDS 48TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX9268GCM/V+

• Function: Deserializer
• Data Rate: 2.5Gbs
• Input Type: Serial
• Output Type: LVDS
• Voltage - Supply: 3.3V
• 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: -

Gigabit Multimedia Serial Link Deserializer
with LVDS System Interface
For image-sensing applications, connect the FC to the
MAX9268 and set CDS = high for both the GMSL serial-
izer and the MAX9268. The deserializer powers up nor-
mally (SLEEP = 0) and continuously tries to lock to a valid
serial input. Table 10 summarizes both startup cases,
based on the state of the GMSL serializer AUTOS pin.
After power-up or when PWDN transitions from low to
high, the GMSL serializer locks to a stable input clock
and sends the high-speed data to the MAX9268. The
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 GMSL serializer starts up in sleep mode. Use the
FC to wake up the serializer by sending a GMSL protocol
UART 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 serializer detects the wake-up
Table 10. Startup Selection for Image-Sensing Applications (CDS = High)
Figure 23. MAX9268 State Diagram, CDS = High (Camera Application)
26
CASE
1
2
_____________________________________________________________________________________
(GMSL SERIALIZER)
ALL STATES
AUTOS
NO SIGNAL
DETECTED
High
Low
Image-Sensing Applications
PWDN = LOW OR
POWER-OFF
POWER-ON
(REVERSE
CHANNEL
ACTIVE)
Case 1: Autostart Mode
IDLE
Case 2: Sleep Mode
Serialization enabled
GMSL SERIALIZER
POWER-UP STATE
(SLEEP = 1)
Sleep mode
PWDN = HIGH,
POWER-DOWN
POWER-ON
POWER-OFF
DETECTED
SIGNAL
OR
VIDEO LINK
SERIAL PORT
LOCKED
LOCKING
MAX9268 POWER-UP
frame over the reverse control channel and powers up.
Reset the sleep bit (SLEEP = 0) of the GMSL serializer
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 GMSL serializer goes
back to sleep mode if its sleep bit is not cleared within
5ms (min) after detecting a wake-up frame.
The MAX9268 checks the serial link for errors and stores
the number of detected decoding errors in the 8-bit
register DECERR (0x0D). If a large number of decoding
errors are detected within a short duration, the deserializer
loses lock and stops the error counter. The deserializer
then attempts to relock to the serial data. DECERR resets
upon successful video link lock, successful readout of
DECERR (through UART), or whenever autoerror reset is
enabled. The MAX9268 does not check for decoding errors
during the internal PRBS test and DECERR is reset to 0x00.
(SLEEP = 0)
(SLEEP = 0)
VIDEO LINK
VIDEO LINK
OPERATING
UNLOCKED
STATE
Normal
Normal
CONFIG LINK
CONFIG LINK
UNLOCKED
LOCKED
PRBSEN = 0
PRBSEN = 1
LINK OPERATING
Applications Information
REGISTERS
PROGRAM
CONFIG
Autostart
GMSL serializer is in sleep mode.
Wake up the serializer through the
control channel (FC attached to
MAX9268).
LINK STARTUP MODE
VIDEO LINK
PRBS TEST
Error Checking