I have interfaced the AD7609 in parallel to a TMS320F28335 GPIO's. I have a problem with ADC busy o/p. When CONVST is Active(High), Busy should be Active(HIGH) and after Tconv(8-channel conversion), Busy should get a High to Low Transition. Till this stage it is working as expected. But, after the Busy High to Low Transition, the CONVST is made low, and all the CS & RD pulses for o/p data are given. The problem is when CONVST is made low, busy isn't getting LOW and when 2nd time CONVST is made active(High) the busy is expected to get a high to low transition, which is not happening. The busy is remaining in High state.
I have used a 70mm length Bus for Data lines & Control signals. Using the 10V range in parallel Interfacing mode and the 5v supply is from power supply and 3.3v supply is from TMS320F28335.
Please reply as soon as possible..it is a scheduled task and i am stuck with it.