I am using only SPI protocol to r/w ade registers
I have a confusion with isolation circuit given in ade7880 evaluation:
In the isolation circuit:
we have pm0,pm1,reset,hsa,irq0,irq1,sb_enb,cf1,cf2,cf3,wp,mosi,miso,ss,sclk.
Firstly what is the utility of sb_enb and wp pins?Are these pins required to be connected to MC?
Secondly I am using normal mode(psm mode 0), so i need to connect PM1 to low(gnd) and PM0 unconnected(active high).So is it required in isolation ckt.
Thirdly,Is there any need of pins CF1, CF2/HREADY ,CF3/HSCLK in isolation ckt. to be connected to MC?(as i am not using HSDC interface).
If i am using CF pins for meter calibration.So is it required for these pins to be connected to MC ?
Fourth,As i am not using hsdc interface so is there any need for hsa pin in isolation ckt?
So according to my requirements,I would be using:
reset---------for s/w reset
irq0,irq1------for handling interrupts
in the isolation ckt for connection to MC.
Please help me to solve this matter.
Thanks and Regards