48SWTQFN-EP datasheet(72/103 Pages) MAXIM

72 / 103 page

MAX9288/MAX9290

3.12Gbps GMSL Deserializers

for Coax or STP Input and MIPI CSI-2 Output

www.maximintegrated.com

Maxim Integrated │ 72

Configuration Link

The control channel can operate in a low-speed mode

called configuration link in the absence of a clock input.

This allows a microprocessor to program configuration

registers before starting the video link. An internal oscil-

lator provides the clock for the configuration link. Set

CLINKEN = 1 on the serializer to enable configuration

link. Configuration link is active until the video link is

enabled. The video link overrides the configuration link

and attempts to lock when SEREN = 1.

Link Startup Procedure

Table 16 lists the startup procedure for image-sensing

applications. The control channel is available after the

video link or the configuration link is established. If the

deserializer powers up after the serializer, the control

channel becomes unavailable for 2ms after power-up.

Table 16. Startup Procedure for Image-Sensing Applications (CDS = High, Figure 58)

NO.

µC

SERIALIZER

DESERIALIZER

(AUTOSTART ENABLED)

(AUTOSTART DISABLED)

—

µC connected to deserializer.

Sets all configuration

inputs.

Sets all configuration

inputs.

Sets all configuration

inputs.

Powers up.

Powers up and loads

default settings.

Establishes video link when

valid PCLK available.

Powers up and loads

default settings. Goes to

sleep after 8ms.

Powers up and loads

default settings.

Locks to video link

signal if available.

Writes deserializer configuration bits

and gets an acknowledge.

Configuration

changed from default

settings.

Wakes up the serializer by sending

dummy packet, and then writing

SLEEP = 0 within 8ms. May not get

an acknowledge (or gets a dummy

acknowledge) if not locked.

Wakes up.

Writes serializer configuration bits.

May not get an acknowledge (or gets

a dummy acknowledge) if not locked.

Configuration changed from default settings.

If not already enabled, sets SEREN =

1, gets an acknowledge and waits for

serial link to be established (~3ms).

Establishes video link when valid PCLK available (if not

already enabled).

Locks to video link

signal (if not already

locked).

Begin sending video data to input.

Video data serialized and sent across serial link.

Video data received

and deserialized.

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