434
11100B–ATARM–31-Jul-12
SAM4S Series [Preliminary]
Figure 25-17. TDF Period in NRD Controlled Read Access (TDF = 2)
Figure 25-18. TDF Period in NCS Controlled Read Operation (TDF = 3)
25.11.2
TDF Optimization Enabled (TDF_MODE = 1)
When the TDF_MODE of the SMC_MODE register is set to 1 (TDF optimization is enabled), the
SMC takes advantage of the setup period of the next access to optimize the number of wait
states cycle to insert.
NCS
NRD controlled read operation
tpacc
MCK
NRD
D[7:0]
TDF = 2 clock cycles
A[23:0]
NCS
TDF = 3 clock cycles
tpacc
MCK
D[7:0]
NCS controlled read operation
A[23:0]
NRD
Summary of Contents for SAM4S Series
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