Datasheet

Electrical characteristics STM32F412xE/G
148/193 DocID028087 Rev 4
Figure 51. 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 85. Asynchronous non-multiplexed SRAM/PSRAM/NOR write timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(NE)
FSMC_NE low time 3 T
HCLK
- 1 3 T
HCLK
+0.5
ns
t
v(NWE_NE)
FSMC_NEx low to FSMC_NWE low T
HCLK
+ 0.5 T
HCLK
+ 0.5
t
w(NWE)
FSMC_NWE low time T
HCLK
– 1.5 T
HCLK
+ 1
t
h(NE_NWE)
FSMC_NWE high to FSMC_NE high hold time T
HCLK
- 1 -
t
v(A_NE)
FSMC_NEx low to FSMC_A valid - 0.5
t
h(A_NWE)
Address hold time after FSMC_NWE high T
HCLK
- 0.5 -
t
v(BL_NE)
FSMC_NEx low to FSMC_BL valid - 1
t
h(BL_NWE)
FSMC_BL hold time after FSMC_NWE high T
HCLK
- 1 -
t
v(Data_NE)
Data to FSMC_NEx low to Data valid - T
HCLK
+ 2
t
h(Data_NWE)
Data hold time after FSMC_NWE high T
HCLK
+ 0.5 -
t
v(NADV_NE)
FSMC_NEx low to FSMC_NADV low - 1
t
w(NADV)
FSMC_NADV low time - T
HCLK
+ 0.5
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