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 1, Figure 2 and
Figure 3
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 1. TDF Optimization Disabled (TDF Mode = 0): TDF wait states
between 2 read accesses on different chip selects
Figure 2. TDF Mode = 0: TDF wait states between a read and a write
access on different chip selects
Figure 3. TDF Mode = 0: TDF wait states between read and write accesses
on the same chip select