48SWTQFN-EP datasheet(75/103 Pages) MAXIM

75 / 103 page

MAX9288/MAX9290

3.12Gbps GMSL Deserializers

for Coax or STP Input and MIPI CSI-2 Output

www.maximintegrated.com

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Table 17. Startup, HDCP Authentication, and Normal Operation (Deserializer is Not a

Repeater)—First Part of the HDCP Authentication Protocol (continued)

NO.

µC

HDCP GMSL SERIALIZER

HDCP GMSL DESERIALIZER

Reads the INVALID_BKSV bit of the GMSL

serializer and continues with authentication

if it is 0. Authentication can be restarted if it

fails (set RESET_HDCP = 1 before restarting

authentication).

—

Reads R0’ from the deserializer and reads

R0 from the GMSL serializer. If they match,

continues with authentication; otherwise,

retries up to two more times (optionally, GMSL

serializer comparison can be used to detect if

R0/R0’ match). Authentication can be restarted

if it fails (set RESET_HDCP = 1 before

restarting authentication).

—

Waits for the VSYNC falling edge (internal to

the GMSL serializer) and then sets the

ENCRYPTION_ENABLE bit to 1 in the

deserializer and GMSL serializer (if the FC is

not able to monitor VSYNC, it can utilize the

VSYNC_DET bit in the GMSL serializer).

Encryption enabled after the

next VSYNC falling edge.

Decryption enabled after the next

VSYNC falling edge.

Checks that BKSV is not in the Key

Revocation list and continues if it is not.

Authentication can be restarted if it fails.

Note: Revocation list check can start after

BKSV is read in step 8.

—

Starts transmission of A/V content that needs

protection.

Performs HDCP encryption on

high-value content A/V data.

Performs HDCP decryption on high-

value content A/V data.

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