Multiple L6470 on one SPI bus without using daisy chain

klaus239955_stm1 · ‎2011-10-07

Posted on October 07, 2011 at 11:40

Is it possible to use multiple L6470 motor driver ICs on the same SPI bus - common SDI, SDO, CK line, but separate chipselect signals for each L6470?

My experimental board doesn't show any data on SDO when more than one chip is connected.

I thought that SDO ports are high impedance as long as chipselect at that chip is not active?

#l6470

Enrico Poli · ‎2011-10-21

Posted on October 21, 2011 at 14:10

Dear Mr. Steinbach,

when the CS input is forced high, the SDO output of L6470 is in high impedance status. This way is possible to drive multiple devices sharing SDI, SDO and CK lines and using separate CS lines for each device.

Best Regards