About BobaJFET

BobaJFET · 2025-01-09

IN AN4899, figure 18, it states:"To reduce power consumption, setthe pin as a push-pull output anddrive it in the same direction as theinternal pull-up / pull-down resistor.Alternately, set pin as analog input."I'm a little confused here. If there is...

BobaJFET · 2024-12-13

I'd like to use both external RAM and flash at the same time for an STM32H7 application. I'd like to get a better idea of what options are available for this. For example, 256Mbyte flash in memory mapped mode for execute in place and 4gb of SRAM indi...

BobaJFET · 2024-12-09

I notice that on the NUCLEO-H753ZI board schematic and BOM, the load capacitors are not populated for X2. My thought is that these caps must exist elsewhere, either built into the crystal, or integrated into the STM32H743.. But I do not see any menti...

BobaJFET · 2025-01-10

Thanks for clarifying. I'll configure them as analog inputs.

BobaJFET · 2024-12-13

I have not chosen a specific H7 chip as of yet since it's dependent on this decision. I'm leaning towards using quadSPI for flash and FMC for RAM. Or, octoSPI for both RAM and flash in multiplexed mode.

BobaJFET · 2024-12-13

For example, this is from AN5050. Here it's a single OSPI. I now question if this is possible with quadSPI as well, but I don't see any mention of this type of configuration in AN4760.

BobaJFET · 2024-12-13

It doesn't need to be SRAM... The goal is just to expand both RAM and flash as much as possible using QSPI and OSPI.

BobaJFET · 2024-12-10

Much appreciated.

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AN4899 un-used pins procedures

Octo/QuadSPI options for using external RAM and FLASH

Does STM32H743 have integrated crystal load capacitors?

Re: AN4899 un-used pins procedures

Re: Octo/QuadSPI options for using external RAM and FLASH

Re: Octo/QuadSPI options for using external RAM and FLASH

Re: Octo/QuadSPI options for using external RAM and FLASH

Re: Does STM32H743 have integrated crystal load capacitors?