Mismatch in 100 Pin connector in schematic and datasheet
Added by Sandeep Sivadas over 1 year ago
Hi,
There is a mismatch in 100 pin DF40HC-100DS-0.4V(58) connector pin details in schematic design and datasheet provided.
Connector J14 : HDMI1_DATA2Y - Pin No: 4 ( In schematic)
In the datasheet, HDMI1_DATA2Y marked as Pin No: 3
Please clarify the same. Which one is correct?
Datasheet link: https://www.criticallink.com/wp-content/uploads/60-000055-MitySOM-AM57_datasheet.pdf
Reagrds
Sandeep S
Replies (4)
RE: Mismatch in 100 Pin connector in schematic and datasheet - Added by Michael Williamson over 1 year ago
Hi Sandeep,
I am sorry for the confusion.
The hirose datasheets don't appear to specify a "pin 1" for these connectors, which is why we have identified "pin 1" on the MitySOM-AM57x Datasheet (figure 3). I think this is partially because there are some configurations with these connectors where an "interposer" allows two plug side connectors on mating PCBs to be used.
The footprints we are using for both the DF40C-100DP-0.4V(51) (SOM Side) and the DF40HC-100DS-0.4V(58) (Carrier Board) assigned "Pin 1" in such a way that the pins are mirrored on the interface when the two connectors are mated: odd pins on the SOM will map to even pins on the carrier card. So pin 3 on the SOM will map to Pin4 on the Carrier card. Pins 1/2 are swapped, 3/4 are swapped, and so forth. I don't think there is an error with the documentation, beyond some confusion with the location of "pin 1" on these connectors.
Have you already completed a Carrier card design? There were some fine adjustments made on the exact position of the Hirose connector (to account for manufacturing tolerances) that are in a later version of the datasheet than the one you have linked. I am working with our web team to make sure the most recent version of the datasheet should be published.
With regards,
Mike
RE: Mismatch in 100 Pin connector in schematic and datasheet - Added by Sandeep Sivadas over 1 year ago
Hi Michael,
Thank you for the clarification.
1. Can we get the Allegro cadence PCB file for the MitySOM AM572x Development Kit. We are using cadence for PCB design.
2. We are in the process of PCB designing. Can you please clarify the fine adjustments made on the exact position of the Hirose connector (to account for manufacturing tolerances).
3. Can we get the exact mechanical position (Mechanical design files) for connecting SOM module to carrier board?
Thanks and regards
Sandeep S
RE: Mismatch in 100 Pin connector in schematic and datasheet - Added by Michael Williamson over 1 year ago
HI Sandeep,
1. The design files are in Altium Designer. I will ask Tom Catalino to send you an updated version of them, I believe you have communicated with him beofre. You may need to find an importer. I will check to see if we have an exporter (I think we can export to ORCAD).
2. There are updated datasheets (you may need to refresh your browser) that update the dimensions in the mechanical figures, specifically with the recommended position of the Hirose connector on the carrier board (figure 4, I believe, of the datasheet). Are you referencing the SOM with or withou the FPGA. Datasheet revision with FPGA: 1H / 6-FEB-2023, without FPGA : 1C / 6-FEB-2023.
3. The Altium files or drawings in the datasheet will provide the positioning of the 2 connectors (Figure 4). What format are you looking for?
RE: Mismatch in 100 Pin connector in schematic and datasheet - Added by Sandeep Sivadas over 1 year ago
Hi Michael,
1. We tried to convert the Altium files to Cadence, then it shows converts only ASCII format file of PCB board.
2. After cleared the Web browser cache, i can download the updated datasheets. Will proceed with the mechanical dimensions provided.
3. I was looking for CAD step files for Carrier board. But now we can proceed with the dimensions provided in the datasheet.
Thanks and regards
Sandeep S
