Datasheet

DocID024030 Rev 10 173/239
STM32F427xx STM32F429xx Electrical characteristics
198
Figure 57. Asynchronous multiplexed PSRAM/NOR read waveforms
Table 89. Asynchronous non-multiplexed SRAM/PSRAM/NOR write -
NWAIT timings
(1)(2)
1. C
L
= 30 pF.
2. Guaranteed by characterization results.
Symbol Parameter Min Max Unit
t
w(NE)
FMC_NE low time 8T
HCLK
+1 8T
HCLK
+2 ns
t
w(NWE)
FMC_NWE low time 6T
HCLK
− 16T
HCLK
+2 ns
t
su(NWAIT_NE)
FMC_NWAIT valid before FMC_NEx high 6T
HCLK
+1.5 - ns
t
h(NE_NWAIT)
FMC_NEx hold time after FMC_NWAIT
invalid
4T
HCLK
+1 ns
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