Looking For External Memory Benchmark on STM32F469/79 using FMC or QSPI interface
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2024-09-25 1:45 PM
Hi,
Anyone know where I can find memory benchmarks on using the different type of external memories on the STM32F469/79 ?
How slower is the PSRAM on FMC or dual Quad SPI compare to internal SRAM ?
thanks
- Labels:
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FMC-FSMC
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QSPI
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SPI
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STM32F4 Series
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2024-09-25 3:28 PM - edited 2024-09-25 3:31 PM
Wouldn't you just test it?
The F4 is an uncached architecture, so external interfaces are going to slam access speed.
SDRAM was 6x slow than internal SRAM, as I recall.
I haven't tried QSPI NOR Flash, but would hazard between 2 and 4x slower than Internal FLASH. That I could read Dual-Quad QPI at approaching 90 MBps in a continuous / large-linear sense, doing nothing else, perhaps loading executable code into Internal SRAM in some mapped/banked scheme.
Some pressing reason not to be using a CM7 device in 2024?
Up vote any posts that you find helpful, it shows what's working..
