VOUT3 port of AM5725

Neelam singh

In our custom Design we are using 24 bit RGB of VOUT3 port for Encoder . According to silicon errata we have given option for on VDDSHV 6 for 1.8V as well as 3.3V. at the starting we are trying on vddshv6 at 3.3v. We are not able to detect I2c address we can not write on i2c but we are able to read on I2c . we then try on vddshv 1.8 volts but did not work . We again switch to 3.3v after that our debugging UART is not working something is coming but we are unable to write .

Any suggestion ? any body from TI can help to resolve this issue .

DSP is booting as we are able to display on HDMI.

Regards

Neelam

over 9 years ago

0 Brad Griffis over 9 years ago

TI__Guru*** 125430 points

Please clarify what problem you're trying to solve. Your post seems to move between a number of different problems:

Presumably an issue with VOUT3 since that's the title, but I'm not clear what issue you're seeing on VOUT3.
Questions or issues related to VDDSHV6 at 1.8V or 3.3V.
Problems with I2C not working.

I suggest focusing on VOUT3 in this thread, since that's the subject. If there are issues related to I2C or VOUT3, please start new threads that focus on those issues.

0 Rogerio Almeida over 9 years ago in reply to Brad Griffis

TI__Mastermind 26205 points

is this post related to this one here: e2e.ti.com/.../1961721 ?

0 Neelam singh over 9 years ago in reply to Brad Griffis

Expert 1035 points

Hello,

We are using VOUT3 on 1.8 Volts for Encoder but we are unable to detect Encoder . as I2c id not detecting encoder. i do not know it is problem of Vddshv6 thread or I2C, as other devices on I2c we are able to detect but not able to detect encoder which is on VOUT3

Regards.

0 Brad Griffis over 9 years ago in reply to Neelam singh

TI__Guru*** 125430 points

That sounds like an issue with the encoder. Are you sure you have the correct I2C address? Have you tried just scanning the I2C bus to see if it will respond to anything?

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VOUT3 port of AM5725