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Table Of Contents
Electrical characteristics STM32F405xx, STM32F407xx
144/202 DocID022152 Rev 8
Figure 55. Asynchronous non-multiplexed SRAM/PSRAM/NOR write waveforms
1. Mode 2/B, C and D only. In Mode 1, FSMC_NADV is not used.
Table 76. Asynchronous non-multiplexed SRAM/PSRAM/NOR write timings
(1)(2)
1. C
L
= 30 pF.
2. Guaranteed by characterization.
Symbol Parameter Min Max Unit
t
w(NE)
FSMC_NE low time 3T
HCLK
3T
HCLK
+ 4 ns
t
v(NWE_NE)
FSMC_NEx low to FSMC_NWE low T
HCLK
–0.5 T
HCLK
+0.5 ns
t
w(NWE)
FSMC_NWE low time T
HCLK
–1 T
HCLK
+2 ns
t
h(NE_NWE)
FSMC_NWE high to FSMC_NE high hold time T
HCLK
–1 - ns
t
v(A_NE)
FSMC_NEx low to FSMC_A valid - 0 ns
t
h(A_NWE)
Address hold time after FSMC_NWE high T
HCLK
– 2 - ns
t
v(BL_NE)
FSMC_NEx low to FSMC_BL valid - 1.5 ns
t
h(BL_NWE)
FSMC_BL hold time after FSMC_NWE high T
HCLK
– 1 - ns
t
v(Data_NE)
Data to FSMC_NEx low to Data valid - T
HCLK
+3 ns
t
h(Data_NWE)
Data hold time after FSMC_NWE high T
HCLK
–1 - ns
t
v(NADV_NE)
FSMC_NEx low to FSMC_NADV low - 2 ns
t
w(NADV)
FSMC_NADV low time - T
HCLK
+0.5 ns
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