DS90UB949-Q1EVM: Need to send 512 bytes of EDID data to the display source

Vivek Karna

Part Number: DS90UB949-Q1EVM
Other Parts Discussed in Thread: ALP

Hello all,

I am using DS90UB949-Q1EVM evaluation kit. I have a CAT24C208 EEPROM which is having 1KB of memory size. I have 512 bytes of EDID data written in the EEPROM device. I need to use the DS90UB949-Q1EVM in such a way that the serializer device can read the 512 bytes of EDID from the external EEPROM and send the data to the display source. As I know that DS-949 serializer device have only 256 bytes of SRAM to store the EDID data, so I can't use the SRAM of serializer device. that's why using the external EEPROM on the EVK kit.

Can you please let me know that how can I write the EDID data bytes in the external EEPROM using the TI AnalogLaunchPAD tool which is used to interface the DS-949 serializer EVK kit. Though, I know that it can be done with script, but don't know how to do that? Also, can you please let me know that is this EEPROM "CAT24C208" supported by the serializer EVK kit?

Thanks & Regards,
Vivek Karna

10 months ago

0 Ben Dattilo 10 months ago

TI__Mastermind 25735 points

Hi Vivek,

Please see the linked threads for more info on how to use external EEPROM:

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1060977/ds90ub949-q1evm-eeprom-type/3924808?tisearch=e2e-sitesearch&keymatch=EEPROM%25252525252520949#3924808

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1110351/ds90ub949a-q1evm-how-to-write-edid-into-ds90ub949?tisearch=e2e-sitesearch&keymatch=EEPROM%25252525252525252520949#

Feel free to reply here if there is any other problem.

Regards,

Ben

0 Vivek Karna 10 months ago in reply to Ben Dattilo

Prodigy 130 points

Hello Ben,

Thanks, I will look to those threads, meanwhile, can you please let me know that if I can read 512 bytes of EDID data from the external EEPROM using DS-949 serializer EVK kit or not? if I can read then what is script to run in ALP tool to read that.

Next thing is this serializer able to read or transfer the 512 bytes of EDID data or not because it has the SRAM of 256 bytes only?

Another point is, does this serializer EVK kit supports all kind of external EEPROM to get the EDID data or not? I am using CAT24C208 serial EEPROM with this serializer EVK kit. Will this serializer EVK kit support this EEPROM?

0 Ben Dattilo 10 months ago in reply to Vivek Karna

TI__Mastermind 25735 points

Hi Vivek,

Vivek Karna said:

Thanks, I will look to those threads, meanwhile, can you please let me know that if I can read 512 bytes of EDID data from the external EEPROM using DS-949 serializer EVK kit or not? if I can read then what is script to run in ALP tool to read that.

Next thing is this serializer able to read or transfer the 512 bytes of EDID data or not because it has the SRAM of 256 bytes only?

You can only write 256 bytes.

The first link I shared includes an attached presentation which has instructions on how to write to SRAM:

/cfs-file/__key/communityserver-discussions-components-files/138/8267.Using-EDID-in-FPD_2D00_Link-Devices.pdf

Vivek Karna said:
Another point is, does this serializer EVK kit supports all kind of external EEPROM to get the EDID data or not? I am using CAT24C208 serial EEPROM with this serializer EVK kit. Will this serializer EVK kit support this EEPROM?

I do not believe we have tried using this, but generally 256 x 8 bit is what has been used on these EVMS, rather than 512 x 16 bit like the device you mention.

Regards,

Ben

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DS90UB949-Q1EVM: Need to send 512 bytes of EDID data to the display source