PROCESSOR-SDK-AM62X: AM6234

Timothy Mueggenberg

I’m looking at the OLDI LVDS interface on the TI AM6234. I couldn’t find the LVDS interface specs in the datasheet. I attempted to find the interface characteristic information on this forum but the closest I found was this thread which didn’t include interface's characteristics.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1131079/sk-am62-lvds-is-1-8v-interface-in-am62x-can-i-use-a-3-3-v-lcd-panel-directly

The AM6234 display’s LVDS power rail is 1.8V, so I'm assuming the OLDI output is LVDS at 1.8V.

I want to directly attach my LVDS 3.3V display to the AM6234.

Since it’s LVDS, as long as the common mode range and the differential voltage swing is compatible between the two devices there will be no problem and I can DC couple the interface. The common mode voltage is 1.2V and the differential voltage swing is between 0.2V and 0.6V.

Please post the LVDS interface characteristics

over 3 years ago

0 Rajashri Hazarika over 3 years ago

TI__Intellectual 1515 points

Hello,

Thank you for the query.

I will have to work on it internally with the team and get back to you soon

Regards

Rajashri

0 Rajashri Hazarika over 3 years ago in reply to Rajashri Hazarika

TI__Intellectual 1515 points

Hello Timothy,

I have checked on this internally and I came to know that the internal team is already working on this.

I can update you based on their response.

Regards

Rajashri

0 Timothy Mueggenberg over 3 years ago

Prodigy 50 points

thank you for the update, I'm keeping this issue open until the internal team updates the interface characteristics

+1 Kallikuppa Sreenivasa over 3 years ago in reply to Timothy Mueggenberg

TI__Guru**** 199419 points

Hello Timothy Mueggenberg

Please refer to the specs from AM65xx having similar interface. You could use this as a reference for your analysis.

https://www.ti.com/lit/ds/symlink/am6548.pdf

Regarding the AM62 below are the input i received and inline with the above note.

the IOs were designed to have a 1.25V common mode voltage with similar differential output swing.

The team is internally working on the specs to be included in the datasheet. We do not have a timeline for the datasheet update.

Regarding the compatibility with the LVD display, if both have LVDS interface, i guess they should be compatible.

Said that, i would recommend checking with the LCD manufacturer on the compatibility or planning prototyping.

Please refer below threads including the part number - LCD part number is LCD185.

.(13) AM625: Interfacing LCD to AM625x - Processors forum - Processors - TI E2E support forums

(+) AM625: Interfacing LCD to AM625x - Processors forum - Processors - TI E2E support forums

(+) AM625: About DSS (Display Subsystem) of AM62x - Processors forum - Processors - TI E2E support forums

(+) AM625: Possible to use two LVDS Display - Processors forum - Processors - TI E2E support forums

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 3 years ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 199419 points

Hello Timothy Mueggenberg

Thank you for closing the thread. Please update us when you are done with the analysis on the LCD compatibility and part number used.

This helps wider audience.

Regard,

Sreenivasa