Datasheet

Electrical characteristics STM32F412xE/G
156/193 DocID028087 Rev 4
Table 92. Synchronous multiplexed PSRAM write timings
(1)(2)
1. C
L
= 30 pF.
2. Based on characterization, not tested in production.
Symbol Parameter Min Max Unit
t
w(CLK)
FSMC_CLK period, V
DD
range= 2.7 to 3.6 V 2T
HCLK
- 0.5 -
ns
t
d(CLKL-NExL)
FSMC_CLK low to FSMC_NEx low (x= 0...2) - 1
t
d(CLKH-NExH)
FSMC_CLK high to FSMC_NEx high (x= 0…2) T
HCLK
+ 0.5 -
t
d(CLKL-NADVL)
FSMC_CLK low to FSMC_NADV low - 1
t
d(CLKL-NADVH)
FSMC_CLK low to FSMC_NADV high 0 -
t
d(CLKL-AV)
FSMC_CLK low to FSMC_Ax valid (x=16…25) - 2
t
d(CLKH-AIV)
FSMC_CLK high to FSMC_Ax invalid (x=16…25) T
HCLK
-
t
d(CLKL-NWEL)
FSMC_CLK low to FSMC_NWE low - 1.5
t
(CLKH-NWEH)
FSMC_CLK high to FSMC_NWE high T
HCLK
+ 0.5 -
t
d(CLKL-ADV)
FSMC_CLK low to FSMC_AD[15:0] valid - 2.5
t
d(CLKL-ADIV)
FSMC_CLK low to FSMC_AD[15:0] invalid 0 -
t
d(CLKL-DATA)
FSMC_A/D[15:0] valid data after FSMC_CLK low - 4
t
d(CLKL-NBLL)
FSMC_CLK low to FSMC_NBL low - 3
t
d(CLKH-NBLH)
FSMC_CLK high to FSMC_NBL high T
HCLK
-
t
su(NWAIT-CLKH)
FSMC_NWAIT valid before FSMC_CLK high 2 -
t
h(CLKH-NWAIT)
FSMC_NWAIT valid after FSMC_CLK high 2 -
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