Datasheet

DocID030538 Rev 3 141/226
STM32H743xI Electrical characteristics
196
Figure 25. Asynchronous multiplexed PSRAM/NOR write waveforms
NBL
Data
FMC_ NEx
FMC_ NBL[1:0]
FMC_ AD[15:0]
t
v(BL_NE)
t
h(Data_NWE)
FMC_NOE
Address
FMC_ A[25:16]
t
v(A_NE)
t
w(NWE)
FMC_NWE
t
v(NWE_NE)
t
h(NE_NWE)
t
h(A_NWE)
t
h(BL_NWE)
t
v(A_NE)
t
w(NE)
MS32756V1
Address
FMC_NADV
t
v(NADV_NE)
t
w(NADV)
t
v(Data_NADV)
t
h(AD_NADV)
FMC_NWAIT
tsu(NWAIT_NE)
th(NE_NWAIT)
Table 69. Asynchronous multiplexed PSRAM/NOR write timings
(1)
Symbol Parameter Min Max Unit
t
w(NE)
FMC_NE low time 4T
fmc_ker_c
− 14T
fmc_ker_ck
ns
t
v(NWE_NE)
FMC_NEx low to FMC_NWE low T
fmc_ker_c
− 1T
fmc_ker_ck
+ 0.5
t
w(NWE)
FMC_NWE low time 2T
fmc_ker_ck
− 0.5 2T
fmc_ker_ck
+ 0.5
t
h(NE_NWE)
FMC_NWE high to FMC_NE high hold time T
fmc_ker_ck
− 0.5 -
t
v(A_NE)
FMC_NEx low to FMC_A valid - 0
t
v(NADV_NE)
FMC_NEx low to FMC_NADV low 0 0.5
t
w(NADV)
FMC_NADV low time T
fmc_ker_ck
T
fmc_ker_ck
+ 1
t
h(AD_NADV)
FMC_AD(address) valid hold time after FMC_NADV high T
fmc_ker_ck
+0.5 -
t
h(A_NWE)
Address hold time after FMC_NWE high T
fmc_ker_ck
+0.5 -
t
h(BL_NWE)
FMC_BL hold time after FMC_NWE high T
fmc_ker_ck
− 0.5 -
t
v(BL_NE)
FMC_NEx low to FMC_BL valid - 0.5
t
v(Data_NADV)
FMC_NADV high to Data valid - T
fmc_ker_ck
+ 2
t
h(Data_NWE)
Data hold time after FMC_NWE high T
fmc_ker_ck
+0.5 -
1. Guaranteed by characterization results.
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