Need bit details about STM32H743VG. 1. Does it has the external memory ? 2. It has five SPIs . Does these SPI pins available on the expansion interface ? 3. Does these SPI can operate on QUAD mode ?

[Gpras.1]

..

[Tesla DeLorean]

YES

NO

NO

There's a specific QUADSPI peripheral, it can't memory map two independent devices. It can side-stack a pair of the same memories in a "bank" mode so the bytes from two NOR FLASH devices interleave, allowing for the doubling of bandwidth.

[Gpras.1]

Thank you. We are looking for an MCU which has SPI (at least 4 with minimum throughput from each one is around 80Mbps ).

and runs @500+ Mhz with external memory, network interface, encryption engine. Important thing is that we need those SPI available on the expansion interface to connect the sensor. Do you have any suggestion ?

[Tesla DeLorean]

Perhaps use a CPLD/FPGA, on a 32-bit wide FMC bus interface (memory mapped, external), to mitigate the interactions between the MCU and the sensors.

Parts using Cortex-A MCU might be a better choice, or FPGA integrating a core.

[Gpras.1]

Do you have any suggestion to connect those SPI pins on the STM32H743VG eval board ? if not, is there any alternative board with which we can connect a slave device to those SPI ?

[Tesla DeLorean]

Which board?

The EVAL series boards tend to be highly committed to the kitchen-sink functionality on the board. DISCO's also tend to be problematic, mostly having the Arduino Shield pins free for interaction.

The NUCLEO-144 boards tend to offer the most freely assignable pins, you'll need to map out pin usage via the Data Sheet. CubeMX/IDE might help, I'm more of a pencil and paper guy, as "not working" tends to blow back directly on me.

There are a bunch of WeAct, DevEBox H7 breakout boards on the AliExpress type markets. WaveShare also has some of their own.

[Pavel A.]

> runs @500+ Mhz with external memory ....

For STM743 this is quite an overclocking. STM32H72x/73x run at 550 MHz and there is a Nucleo with it.

When connecting a SPI device to Nucleo board, keep in mind that flying long wires won't allow a decent bitrate (with normal connection on the PCB our slave devices work at their nominal bitrates ~ 40 Mbit/s, but we could not get more than 7-10 Mbit/s with flying wires.)

[Gpras.1]

Hi Pavel A .

Thanks for the response. I have looked into the Nucleo board for STM32H743ZIT6. It seems that external memory is not mounted on the board though processor support it. Is this understanding correct ? If yes, do you have any variant of Nucleo board with STM32H743ZIT6 that support the external memory.

[Gpras.1]

Hi Pavel A

Can you please guide me to place where I can download the board schematic of the STM32 Nucleo-144 development board with STM32H753ZI MCU ?

[Tesla DeLorean]

Go the the CAD Resources tab on the NUCLEO boards​ page

[Gpras.1]

Thanks for quick response. We need two SPI devices for our prototyping. I can find all pins related to SPI_A (MISO,MOSI,CLK,CS) in the schematic. But not able to locate the SPI_B_CS in the schematic (specifically in the CN7 connector ). Is the SPI_B_CS is name differently ?(SPI_B_NSS ?)

[Gpras.1]

Thanks for quick response. We need two SPI devices for our prototyping. I can find all pins related to SPI_A (MISO,MOSI,CLK,CS) in the schematic. But not able to locate the SPI_B_CS in the schematic (specifically in the CN7 connector ). Is the SPI_B_CS is name differently ?(SPI_B_NSS ?)

[Tesla DeLorean]

You'd perhaps look at the Data Sheet and identify the pin designations, ie PB7, specific SPI or GPIO functionality and relate that to header pin(s)

CS, NCS, SS and NSS can be used somewhat interchangeably and loosely. The awkwardness of the SPI peripheral generally has people using a GPIO to drive a chip select pin low or high

[Gpras.1]

Thank you. I am thinking to buy NUCLEO-H753ZI board for our POC developement. Can you please provide the details from where I can down load supporting software for IAR tool chain (like drivers for peripherals and examples using those drivers ). Do we have FreeRTOS ported to this platform ?? If yes, where can I find the example for it ?