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Part Number: TMUX1574
Customer use BMC->U119 SPI mux-> load SPI flash and use another path I/O card->U549->U119-> load SPI flash.
U119 is TMUX1574 and load SPI flash code is fail. But if change U119 to SN74CB3Q3257. SPI Flash code is loaded successfully. Why is the issue rot cause and the difference? Attached is testing waveform. Thank you.
What is the voltage supply you are using for both switches? What is the maximum SPI clock signal frequency?
Any reason why you are using two different types of switches SN74CB3Q3257 and TMUX1574?
The TMUX1574 device was specifically designed for SPI mux applications and has a wide operating voltage and 1.8V compatible control logic which makes it suitable for many applications including multiplexing SPI lines.
I am reviewing the scope shots and get back to you with more details.
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In reply to Saminah C:
Supply voltage is 3.3V and 50MHz. if used U119 3257 , BMC load SPI Flash code is fail. But U119 change to TMUX1574 from 3257 . BMC load SPI flash code is successful. We will send compare waveform between TMUX1574 and 3257 later. Thank you.
In reply to Patrick Chen:
Attached is customer issue description and testing waveform. Has any comments for this issue? Thank you.
Thank you for sharing the details.
Looking at the waveforms you shared, we still need some more information to understand the issue.
Is it possible to share the following information:
You can share the information via email if that works better.
Thanks. We will update the above information while get it from customer Could you help provide your email to me? Thank you.
Sure. please share details at firstname.lastname@example.org.
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