Datasheet

Electrical characteristics STM32F20xxx
136/184 DS6329 Rev 16
Figure 60. Asynchronous multiplexed PSRAM/NOR write waveforms
t
h(Data_NE)
Data hold time after FSMC_NEx high 0 - ns
t
h(Data_NOE)
Data hold time after FSMC_NOE high 0 - ns
1. C
L
= 30 pF.
2. Guaranteed by characterization results, not tested in production.
Table 75. Asynchronous multiplexed PSRAM/NOR write timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(NE)
FSMC_NE low time 4 T
HCLK
- 1 4 T
HCLK
+ 1 ns
t
v(NWE_NE)
FSMC_NEx low to FSMC_NWE low T
HCLK
- 1 T
HCLK
ns
t
w(NWE)
FSMC_NWE low tim e 2 T
HCLK
2 T
HCLK
+ 1 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
v(NADV_NE)
FSMC_NEx low to FSMC_NADV low 1 2 ns
t
w(NADV)
FSMC_NADV low time T
HCLK
– 2 T
HCLK
+ 2 ns
t
h(AD_NADV)
FSMC_AD(adress) valid hold time after
FSMC_NADV high)
T
HCLK
-ns
Table 74. Asynchronous multiplexed PSRAM/NOR read timings
(1)(2)
(continued)
Symbol Parameter Min Max Unit
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