GD3160 SPI's usage

[liutao123]

Excuse me, how to address a single GD3160 device when accessing multiple GD3160 devices through SPI daisy chain using MCU? It seems that your manual does not describe this application scenario. Or is it that every communication sends the same command to all devices on the daisy chain?

[guoweisun]

HI 

This daisy chain control descript in datasheet page72:  11.13.5 Daisy chain operation

Thanks!

[liutao123]

1. I have seen the image you mentioned above, taking Figure 39 as an example. I just want to know why DEVICE1 does not respond to the first or second command, and only DEVICE3 can recognize it. The data frame also does not contain the device address. Or do I not need to worry about these? I just need to control the MCU to output three commands, and they will automatically match to the corresponding devices.

2. Also, if there are only two GD3160 in my daisy chain, would it be sufficient to send only two command frames as shown in Figure 39