XDIMAX Products Forum

No problem. Thanks for your help so far.

Just tell me - why did you suggest the configuration you did. That is all I want to know. Because we might end up using sub-20 in another applications as well.

Thanks in advance.

Regards,

Amit

I used this:

Clock Phase And Polarity: The LTC6802-2 SPI compatible
interface is configured to operate in a system using
CPHA = 1 and CPOL = 1. Consequently, data on SDI must
be stable during the rising edge of SCKI.

It means you can sample on rising edge

Data Transfers: Every byte consists of 8 bits. Bytes are
transferred with the most significant bit (MSB) first. On a
write, the data value on SDI is latched into the device on
the rising edge of SCKI (Figure 6). Similarly, on a read,
the data value output on SDO is valid during the rising
edge of SCKI and transitions on the falling edge of SCKI

It means setup on falling edge.

I assume SDI is data from IC to SUB-20 and
SDO is from SUB-20 to IC

If it is vice versa you will need instead SETUP_SAMPLE

Thanks!

Amit