Datasheet

DS10198 Rev 8 235/270
STM32L476xx Electrical characteristics
238
NAND controller waveforms and timings
Figure 53 through Figure 56 represent synchronous waveforms, and Table 117 and
Table 118 provide the corresponding timings. The results shown in these tables are
obtained with the following FMC configuration:
• COM.FMC_SetupTime = 0x02
• COM.FMC_WaitSetupTime = 0x03
• COM.FMC_HoldSetupTime = 0x02
• COM.FMC_HiZSetupTime = 0x03
• ATT.FMC_SetupTime = 0x01
• ATT.FMC_WaitSetupTime = 0x03
• ATT.FMC_HoldSetupTime = 0x02
• ATT.FMC_HiZSetupTime = 0x03
• Bank = FMC_Bank_NAND
• MemoryDataWidth = FMC_MemoryDataWidth_16b
• ECC = FMC_ECC_Enable
• ECCPageSize = FMC_ECCPageSize_512Bytes
• TCLRSetupTime = 0
• TARSetupTime = 0
In all timing tables, the T
HCLK
is the HCLK clock period.
Table 116. Synchronous non-multiplexed PSRAM write timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(CLK)
FMC_CLK period 2T
HCLK
-0.5 -
ns
t
d(CLKL-NExL)
FMC_CLK low to FMC_NEx low (x=0..2) - 2
t
d(CLKH-NExH)
FMC_CLK high to FMC_NEx high (x= 0…2) T
HCLK
+0.5 -
t
d(CLKL-NADVL)
FMC_CLK low to FMC_NADV low - 2
t
d(CLKL-NADVH)
FMC_CLK low to FMC_NADV high 2.5 -
t
d(CLKL-AV)
FMC_CLK low to FMC_Ax valid (x=16…25) - 5
t
d(CLKH-AIV)
FMC_CLK high to FMC_Ax invalid (x=16…25) T
HCLK
-1 -
t
d(CLKL-NWEL)
FMC_CLK low to FMC_NWE low - 2
t
d(CLKH-NWEH)
FMC_CLK high to FMC_NWE high T
HCLK
-1 -
t
d(CLKL-Data)
FMC_D[15:0] valid data after FMC_CLK low - 4.5
t
d(CLKL-NBLL)
FMC_CLK low to FMC_NBL low 1.5 -
t
d(CLKH-NBLH)
FMC_CLK high to FMC_NBL high T
HCLK
+1 -
t
su(NWAIT-CLKH)
FMC_NWAIT valid before FMC_CLK high 0 -
t
h(CLKH-NWAIT)
FMC_NWAIT valid after FMC_CLK high 4 -
1. CL = 30 pF.
2. Guaranteed by characterization results.
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