Datasheet

DS6329 Rev 16 141/184
STM32F20xxx Electrical characteristics
183
Figure 64. Synchronous non-multiplexed PSRAM write timings
t
d(CLKL-NADVH)
FSMC_CLK low to FSMC_NADV high 4 - ns
t
d(CLKL-AV)
FSMC_CLK low to FSMC_Ax valid (x=16…25) - 0 ns
t
d(CLKL-AIV)
FSMC_CLK low to FSMC_Ax invalid (x=16…25) 3 - ns
t
d(CLKH-NOEL)
FSMC_CLK high to FSMC_NOE low - 1 ns
t
d(CLKL-NOEH)
FSMC_CLK low to FSMC_NOE high 1.5 - ns
t
su(DV-CLKH)
FSMC_D[15:0] valid data before FSMC_CLK high 8 - ns
t
h(CLKH-DV)
FSMC_D[15:0] valid data after FSMC_CLK high 0 - ns
1. C
L
= 30 pF.
2. Guaranteed by characterization results, not tested in production.
Table 79. Synchronous non-multiplexed PSRAM write timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(CLK)
FSMC_CLK period 2 T
HCLK
- 1 - ns
t
d(CLKL-NExL)
FSMC_CLK low to FSMC_NEx low (x=0..2) - 1 ns
t
d(CLKL-NExH)
FSMC_CLK low to FSMC_NEx high (x= 0…2) 1 - ns
Table 78. Synchronous non-multiplexed NOR/PSRAM read timings
(1)(2)
(continued)
Symbol Parameter Min Max Unit
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