34.12.3 TDF Optimization Disabled (TDF_MODE = 0)

When optimization is disabled, TDF Wait states are inserted at the end of the read transfer, so that the data float period is ended when the second access begins. If the hold period of the read1 controlling signal overlaps the data float period, no additional TDF Wait states will be inserted.

Figure 34-23, Figure 34-24 and Figure 34-25 illustrate the following cases, with no TDF optimization:

  • Read access followed by a read access on another chip select
  • Read access followed by a write access on another chip select
  • Read access followed by a write access on the same chip select
Figure 34-23. TDF Optimization Disabled (TDF Mode = 0): TDF Wait states between 2 read accesses on different chip selects
Figure 34-24. TDF Mode = 0: TDF Wait states between read and write accesses on different chip selects
Figure 34-25. TDF Mode = 0: TDF Wait states between read and write accesses on the same chip select