If there recommended bus switch for Quad SPI, please let me know.
(I didn't find match device)
Customer condition is below;
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・Master: 1, Slave: 3
・Master's I/O port is connecting these Slave side and ON/OFF switch by bus switch.
・Always communicate one-Master and any one-Slave, the other Slave are switch OFF.
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Best regards,
Satoshi
Satoshi-san,
Why can't you have the master and the 3 slaves all on the same bus and use the chip select bit (/CS) defined in the qSPI protocol to determine which slave to select? Are you I/O limited to communicate to the slave devices?
When I searched the switches and multiplexers forum for qSPI, I found several posts around the TS3A27518E device. This is a 6-channel device which switch means it can switch all six bits of the SPI protocol 4 data lanes, clock, and /CS.
The TI switch portfolio offers 7 different 3:1 devices. To cover all 6 bits of qSPI you will need to use 3x TS3USB3031 devices or 1x SN74CBT16214 with 6 unused channels.
Let me know if these will work in your system.
Thank you,
Adam
