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DS90UB901/DS90UB902

Guillermo Maroto
Prodigy 150 points


Good morning TI,

For our project we have to send an photo from sensor OV2640 over 2m.

We've decided use the module SERDESUB-16OVT (I have it in my hands)for test the DS90UB901/902.

I would like to test the Serial comunication without the I2C, How can I do it? I've tried to put

SER DES PASS LOCK
Master Master HIGH HIGH
Master Slave HIGH LOW
Slave Master HIGH HIGH
Slave Slave LOW HIGH

When LOCK is HIGH, it mean I can test without I2c?

By the way I found a mistake in the module SERDESUB-16OVT.

For select the address of the modules in I2c , we have to choose between some resistors (Rid) but in the module Rid doesn't make sense. It's R4= Rid = 220 ohm. I've attached a picture.

Should I have to change to 0ohm?

 

Thank you very much, I hope your fast reply

Kind Regards

  • 0
    TI__Expert 7395 points

    Hi Guillermo,

    In order to configure the OV2640 using the DS90UB901/902, I2C communication is required to initialize the camera. You will need to configure the 901/902 in camera mode:

    OV2640 (i2c slave) -> 901 (MODE pin=0; i2c master) -> 902 (MODE pin=1; i2c slave) -> Host (i2c master). You will need to program 902 registers 0x08 and 0x10 to match the slave address of the OV2640. The Lock pin needs to be High before initiating the i2c communication over the link. There is a example of camera mode in the 901/902 EVM user manual (pg 21-22) -- http://www.ti.com/lit/pdf/snlu100

    Dac Tran

    SVA APPS