Datasheet

DocID030538 Rev 3 139/226
STM32H743xI Electrical characteristics
196
Figure 24. Asynchronous multiplexed PSRAM/NOR read waveforms
Table 66. Asynchronous non-multiplexed SRAM/PSRAM/NOR write - NWAIT timings
(1)(2)
Symbol Parameter Min Max Unit
t
w(NE)
FMC_NE low time 8T
fmc_ker_ck
− 1 8T
fmc_ker_ck
+ 1
ns
t
w(NWE)
FMC_NWE low time 6T
fmc_ker_ck
− 1.5 6T
fmc_ker_ck
+ 0.5
t
su(NWAIT_NE)
FMC_NWAIT valid before FMC_NEx high 5T
fmc_ker_ck
+ 13 -
t
h(NE_NWAIT)
FMC_NEx hold time after FMC_NWAIT invalid 4T
fmc_ker_ck
+ 13 -
1. Guaranteed by characterization results.
2. N
WAIT
pulse width is equal to 1 AHB cycle.
NBL
Data
FMC_ NBL[1:0]
FMC_ AD[15:0]
t
v(BL_NE)
t
h(Data_NE)
Address
FMC_ A[25:16]
t
v(A_NE)
FMC_NWE
t
v(A_NE)
MS32755V1
Address
FMC_NADV
t
v(NADV_NE)
t
w(NADV)
t
su(Data_NE)
t
h(AD_NADV)
FMC_ NE
FMC_NOE
t
w(NE)
t
w(NOE)
t
v(NOE_NE)
t
h(NE_NOE)
t
h(A_NOE)
t
h(BL_NOE)
t
su(Data_NOE)
t
h(Data_NOE)
FMC_NWAIT
tsu(NWAIT_NE)
th(NE_NWAIT)
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