Datasheet

DocID027107 Rev 6 155/202
STM32F446xC/E Electrical characteristics
175
Figure 51. Asynchronous non-multiplexed SRAM/PSRAM/NOR write waveforms
1. Mode 2/B, C and D only. In Mode 1, FMC_NADV is not used.
Table 88. Asynchronous non-multiplexed SRAM/PSRAM/NOR write timings
(1)(2)
1. C
L
= 30 pF.
2. Guaranteed based on test during characterization.
Symbol Parameter Min Max Unit
t
w(NE)
FMC_NE low time 3 T
HCLK
- 2 3 T
HCLK
+0.5
ns
t
v(NWE_NE)
FMC_NEx low to FMC_NWE low T
HCLK
– 0.5 T
HCLK
+ 0.5
t
w(NWE)
FMC_NWE low time T
HCLK
T
HCLK
+ 0.5
t
h(NE_NWE)
FMC_NWE high to FMC_NE high hold time T
HCLK
+ 0.5 -
t
v(A_NE)
FMC_NEx low to FMC_A valid - 0
t
h(A_NWE)
Address hold time after FMC_NWE high T
HCLK
- 0.5 -
t
v(BL_NE)
FMC_NEx low to FMC_BL valid - 1
t
h(BL_NWE)
FMC_BL hold time after FMC_NWE high T
HCLK
+ 0.5 -
t
v(Data_NE)
Data to FMC_NEx low to Data valid - T
HCLK
+ 2
t
h(Data_NWE)
Data hold time after FMC_NWE high T
HCLK
+ 0.5 -
t
v(NADV_NE)
FMC_NEx low to FMC_NADV low - 0
t
w(NADV)
FMC_NADV low time - T
HCLK
+ 0.5
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