SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Bit 1 determines if the data should be written out or not. In some cases software might only want to write the descriptor out to determine the size of the buffer that will be required to store incoming data. By setting this bit,no data will be written out. If this bit is set then the Write Descriptor bit MUST be set. Bit 0 determines where the descriptor should be written. If it is desired that all the descriptors are written in order to a set queue then this bit should be set and the CURRENT_DESCRIPTOR, DESCRIPTOR_TOP and DESCRIPTOR_BOTTOM registers are used to define the location of the descriptor queue that will be written.