ADAS1000 Issue in reading ECGCTL or any other register in SPORT interface

Dear Analog Device,

          Thanks for responding, please find clarification below as follows:

• Port F dedicated for only for SPORT0, Connection between Blackfin’s SPORT0 & ADAS1000 :

• Periodically at regular interval of time need to check the status registers to read ECGCTL, yes for status  & verification only.
• Please guide on this (While the SPORT is receiving data from other serial interfaces (other sports, ADC etc), you can still enable SPI peripheral of blackfin and read/write registers from the device. You just have to take care of interrupts and other flows.)  Since SPORT0 is open for receiving the data, I made attempt read the directly register, which causing ADAS1000 in faulty  state by adding few lines form reference example adas1000_sdp_v1(https://wiki.analog.com/_media/resources/tools-software/bfin/adas1000_sdp_v1.zip).
• ADAS1000, ECGCTL- register has file Reference  voltage VREF as shown below.
  • What is the voltage level of VREF,  If VEFBUFF pin set to zero
  • What is the voltage level of VREF,  ,  If VEFBUFF pin set to one?

Thanks & Regards,

Pradeep A.N