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STM32H7 bảng dữ liệu(PDF) 153 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  32-bit Arm® Cortex®-M7 480MHz MCUs, up to 2MB flash, up to 1MB RAM, 46 com. and analog interfaces
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STM32H7 bảng dữ liệu(HTML) 153 Page - STMicroelectronics

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DS12110 Rev 10
153/357
STM32H742xI/G STM32H743xI/G
Electrical characteristics (rev Y)
320
Synchronous waveforms and timings
Figure 28 through Figure 31 represent synchronous waveforms and Table 74 through
Table 77 provide the corresponding timings. The results shown in these tables are obtained
with the following FMC configuration:
•
BurstAccessMode = FMC_BurstAccessMode_Enable
•
MemoryType = FMC_MemoryType_CRAM
•
WriteBurst = FMC_WriteBurst_Enable
•
CLKDivision = 1
•
DataLatency = 1 for NOR flash; DataLatency = 0 for PSRAM
In all the timing tables, the Tfmc_ker_ck is the fmc_ker_ck clock period, with the following
FMC_CLK maximum values:
•
For 2.7 V<VDD<3.6 V, FMC_CLK =100 MHz at 20 pF
•
For 1.8 V<VDD<1.9 V, FMC_CLK =100 MHz at 20 pF
•
For 1.62 V<VDD<1.8 V, FMC_CLK =100 MHz at 15 pF
Table 73. Asynchronous multiplexed PSRAM/NOR write-NWAIT timings(1)
Symbol
Parameter
Min
Max
Unit
tw(NE)
FMC_NE low time
9Tfmc_ker_ck – 1
9Tfmc_ker_ck
ns
tw(NWE)
FMC_NWE low time
7Tfmc_ker_ck – 0.5 7Tfmc_ker_ck + 0.5
tsu(NWAIT_NE)
FMC_NWAIT valid before FMC_NEx high
6Tfmc_ker_ck + 3
-
th(NE_NWAIT)
FMC_NEx hold time after FMC_NWAIT invalid
4Tfmc_ker_ck
-
1. Guaranteed by characterization results.



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