Hello. I try to figure out what's the factory default behavior of the SC16IS741A chip, without any configuration encoded whatsoever, in SPI mode.
- First will it be usable as is, with factory default? Or am I forced to encode configuration setting registers to make it work? (Assuming default settings are OK for my application) And if yes what will do basically, in SPI mode.
- Is the default word format is 8N1. The datasheet indicates that "no parity" is "default normal condition". But it doesn't indicates the default condition for the stop bit (Is it 1 or 2?). It would be 0-1 if LCR default is 0. (how could it be without stop bit ???) And it doesn't indicate the default value for the word length. Here, if the value in LCR and  the word length would 5, which is very strange. So, what are the default values for LCR, and ?
- In SPI mode, as FIFO is left disabled by default, is it necessary to send a read request ("10000000" followed by the response) or would data flow automatically from RX to SO? And vice versa: Would it be necessary to send a write request instead of just feeding the data through the circuit?