so you tried but it did not work?
Yes. There was some issue with initializing
the SPI chain correctly. It looked like a
chain of length '1' was not supported.
I also made a 10 chip A1 board, but never
even populated it. It all took too much time
and we moved on.
But c-cape did the coding, you should ask
him for details.
I can also confirm that a single chip A1 board did not function by itself. It replied to soft reset, but refused to be enumerated. It functioned fine when plugged as chip-3 into a 2 chip chain, though.