DS90UB948-Q1: Schematic review

Kygo Cheng

Expert 6830 points

Part Number: DS90UB948-Q1
Other Parts Discussed in Thread: DS90UH984-Q1

Hi Team,

There is a good new that we DIN DS90UB948-Q1 !

I mainly want to confirm whether the connection between DS90UB948-Q1 and the customer's panel is correct!

Could you tell me how to check? THX

Figure 1 below is the panel's connect used by RD,

5342.BD2390TA2-F.PDF 7418.ILL123AWU01ES V6.0 SPEC.PDF

over 4 years ago

+1 Michelle Liu over 4 years ago

TI__Genius 11405 points

Hi Kygo,

To check the connection, please use DS90UH984-Q1 datasheet. Make sure the connection and termination is recommended as in Datasheet.

Thanks and Regards,

Michelle

0 Kygo Cheng over 4 years ago in reply to Michelle Liu

TI__Expert 6830 points

Hi Michelle,

Thank you

I couldn't find DS90UH984-Q1 datasheet. Could you share it to me?

+1 Michelle Liu over 4 years ago in reply to Kygo Cheng

TI__Genius 11405 points

Hi Kygo,

Sorry, it was a typo. DS90UB948-Q1 data sheet is available online https://www.ti.com/lit/ds/symlink/ds90ub948-q1.pdf?ts=1627490150373&ref_url=https%253A%252F%252Fwww.google.com%252F

Regards,

Michelle

0 Kygo Cheng over 4 years ago in reply to Michelle Liu

TI__Expert 6830 points

There is no EVEN CLOCK in customer panel !

How do DS90UB948-Q1 EVEN CLOCK connect to customer panel? THX

+1 Michelle Liu over 4 years ago in reply to Kygo Cheng

TI__Genius 11405 points

Hi Kygo,

From the mode selection, the DS90UB948 is used in dual OLDI mode. Both clocks should be connected to display. From the display document, it seems it only takes one clock for all 8 pairs of LVDS signals. This needs to be brought up to the customer that data on 2nd port is not expected to be aligned to clock from first port.

In addition, the header connection on schematics are not consistent with the display document. This also needs to be checked with customer.

Thanks and Regards,

Michelle

0 Kygo Cheng over 4 years ago in reply to Michelle Liu

TI__Expert 6830 points

Hi Michelle

If there is only one port on the customer panel! How to connect with our DS90UB948?

And ,what do you mean about "This needs to be brought up to the customer that data on 2nd port is not expected to be aligned to clock from first port."

THX

0 Michelle Liu over 4 years ago in reply to Kygo Cheng

TI__Genius 11405 points

Hi Kygo,

Please see attached snapshot from datasheet. This is the single link openLDI connection. When there is one port, the 2nd port is IDLE.

The 2nd port data lanes were connected in customer schematics. If the customer intended to use all D0 to D7 data lanes and align only to CLK1, that is not a 948 use case. The D4-D7 is not expected to be aligned to CLK1.

Regards,

Michelle

0 Kygo Cheng over 4 years ago in reply to Michelle Liu

TI__Expert 6830 points

Hi Michelle,

Please recommend a 4-channel ADC to I2C IC customer's PAB board to add some voltage points for detection!

Requirements: voltage 3.3V power supply

0 Michelle Liu over 4 years ago in reply to Kygo Cheng

TI__Genius 11405 points

Hi Kygo,

I don't quite understand the request. So you need some voltage detection circuit? Which voltage rail will be monitored? What is the role of ADC and I2C circuit?

If you have a diagram, that'll be great. Thanks

Regards,

Michelle

0 Kygo Cheng over 4 years ago in reply to Michelle Liu

TI__Expert 6830 points

Hi Michelle,

I think I should find what customer need!

The ADS1119 is 16-bit, 1kSPS, 4-ch general-purpose delta-sigma ADC with I2C interface and external Vref inputs!

Thank you

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DS90UB948-Q1: Schematic review