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DocID030538 Rev 3 151/226
STM32H743xI Electrical characteristics
196
Figure 33. NAND controller waveforms for common memory write access
MS32770V1
t
w(NWE)
t
h(NWE-D)
t
v(NWE-D)
FMC_NWE
FMC_N
OE
FMC_D[15:0]
t
d(D-NWE)
ALE (FMC_A17)
CLE (FMC_A16)
FMC_NCEx
t
d(ALE-NOE)
t
h(NOE-ALE)
Table 75. Switching characteristics for NAND Flash read cycles
(1)
Symbol Parameter Min Max Unit
t
w(N0E)
FMC_NOE low width 4T
fmc_ker_ck
− 0.5 4T
fmc_ker_ck
+ 0.5
ns
t
su(D-NOE)
FMC_D[15-0] valid data before FMC_NOE high 8 -
t
h(NOE-D)
FMC_D[15-0] valid data after FMC_NOE high 0 -
t
d(ALE-NOE)
FMC_ALE valid before FMC_NOE low - 3T
fmc_ker_ck
+ 1
t
h(NOE-ALE)
FMC_NWE high to FMC_ALE invalid 4T
fmc_ker_ck
− 2-
1. Guaranteed by characterization results.
Table 76. Switching characteristics for NAND Flash write cycles
(1)
Symbol Parameter Min Max Unit
t
w(NWE)
FMC_NWE low width 4T
fmc_ker_ck
− 0.5 4T
fmc_ker_ck
+ 0.5
ns
t
v(NWE-D)
FMC_NWE low to FMC_D[15-0] valid 0 -
t
h(NWE-D)
FMC_NWE high to FMC_D[15-0] invalid 2T
fmc_ker_ck
− 0.5 -
t
d(D-NWE)
FMC_D[15-0] valid before FMC_NWE high 5T
fmc_ker_ck
− 1-
t
d(ALE-NWE)
FMC_ALE valid before FMC_NWE low - 3T
fmc_ker_ck
+ 0.5
t
h(NWE-ALE)
FMC_NWE high to FMC_ALE invalid 2T
fmc_ker_ck
− 1-
1. Guaranteed by characterization results.
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