This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: ISO7762
We are using ISO7762F for providing isolation of RS485 communication. Please refer the schematic , We are facing CRC error at the USB to RS485 Transceiver ,we have observed the waveform very closely & found that only 9Th byte of Received data packets getting corrupted, any data on that byte is read as "00" . We have also tapped the MCU data , when transceiver is not polling using MBPOL all the data tx & rx before & after ISOLATOR are read correctly. however when we start polling using MBpoll CRC error persist.
We have tired changing USB to RS485 transceiver still CRC error remains same. We can share gerber file if needed.
Please help me for the same.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Koteshwar Rao:
I have tired the above suggestion , when there is no ISO7762F it works just fine when it goes to original circuit i face the issue. Please find sch & gerber in the below mail. please suggest , we have done various trial & error, We have made discrete isolator board ( Using instead of using FODM8061) ISO7762 it works just fine.
In reply to Gaurav Valecha:
Dear Mr.Rao ,
The above suggestion did not solved the issue so previously we were using ISO7762F & then we replaced it with ISO7762 , it is working fine now , However thank you for your support .
We have given go ahead to our EMS vendor for its mass prdouction . Again Thank you
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.