Datasheet

DocID027107 Rev 6 169/202
STM32F446xC/E Electrical characteristics
175
SDRAM waveforms and timings
Figure 62. SDRAM read access waveforms (CL = 1)
Table 99. Switching characteristics for NAND Flash write cycles
(1)
1. C
L
= 30 pF.
Symbol Parameter Min Max Unit
t
w(NWE)
FMC_NWE low width 4T
HCLK
- 2 4T
HCLK
ns
t
v(NWE-D)
FMC_NWE low to FMC_D[15-0] valid 0 - ns
t
h(NWE-D)
FMC_NWE high to FMC_D[15-0] invalid 3T
HCLK
– 1 - ns
t
d(D-NWE)
FMC_D[15-0] valid before FMC_NWE high 5T
HCLK
– 3 - ns
t
d(ALE-NWE)
FMC_ALE valid before FMC_NWE low - 3T
HCLK
- 0.5 ns
t
h(NWE-ALE)
FMC_NWE high to FMC_ALE invalid 3T
HCLK
– 2 - ns
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