37.13.3 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 ends 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.

The figures below illustrate the cases:

  • 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,

with no TDF optimization.

Figure 37-20. TDF Optimization Disabled (TDF Mode = 0). TDF wait states between 2 read accesses on different chip selects
Figure 37-21. TDF Mode = 0: TDF wait states between a read and a write access on different chip selects
Figure 37-22. TDF Mode = 0: TDF wait states between read and write accesses on the same chip select