I am setting AD9858 DDS using serial interface. SIP.
I feel confused about the Control function register (CFR)' s LSB bit 0: ; address 0x00, CFR
The default value is 0, which meas MSB first out , I think.
BUT I need to sent the data like [31:24 ] , [23:16], [15:8],[7:0] (0x00, 0x00, 0x00, 0x18)
or [7:0], [15:8],[23:16],[31:24] (0x18,0x00,0x00,0x00) ???
also , if the LSB bit is set to 1 ,
How to send the address byte?
I think it is very important for the configuration of SPI.