About shffhsdfhse

shffhsdfhse · 2022-04-14

I'm having trouble figuring out if an STM32H7 needs terminations for a HyperRAM memory. The memory I'm using has variable drive strength on the HyperRAM side, so I won't need terminations for RAM->MCU direction.However, I can't find any information i...

shffhsdfhse · 2022-04-13

I'm doing some signal integrity verifications using the STM32H7 IBIS models to determine if I need terminations for connecting my STM32H7 to a HyperRAM memory.I was a bit surprised with the poor signal integrity I was getting, which I assumed was due...

shffhsdfhse · 2021-12-15

Assuming that the MCU has the Secure Services feature (Secure Boot), does the BOOT0 pin have any use? My understanding is that the application in the secure bootloader would decide its entry point rather than using the addresses specified by the BOOT...

shffhsdfhse · 2021-04-08

I'm doing PCB layout and I'm trying to assign pins for the HyperRAM (HyperBus) that will give me the simplest layout.The app note for the RAM IC has extremely strict length matching requirements. For example, matching between the data lines all have ...

shffhsdfhse · 2021-01-21

The STM32H733VGH6 datasheet specifically mentions "Bootloader with security services support (SFI and SB-SFU)," while the STM32H723VGH6 does not. Does that mean that I can't use encrypted firmware on the STM32H723VGH6?I tried to do some research, but...

shffhsdfhse · 2022-09-23

I think the issue is that this memory, and the memory-controller peripheral support for it, is still relatively new and probably not that popular. However, when you need decently fast and large memory in a small package, it's hard to beat.I can't say...

shffhsdfhse · 2022-09-23

Unfortunately no. There doesn't seem to be good documentation about HyperBUS anywhere. Even the HyperBUS memory vendors have very limited information, and they don't have information when you submit support tickets.I'm guessing that the best approach...

shffhsdfhse · 2022-04-14

I already did some testing with the simulations and adding the resistor in the middle did seem to greatly improve the signal quality. I might try to add them to the board just in case.However, the H735G-DK doesn't have the resistors in the middle, it...

shffhsdfhse · 2022-04-14

I might actually be having some issue with the simulation tool.I'm getting essentially identical results when using the io8_hslv_ft_hs_1v8 (high-speed hslv) model vs the io8_hslv_ft_ls_1v8 (low-speed hslv) models.Same thing when using io8_ft_hs_1v8 (...

shffhsdfhse · 2021-12-15

I was able to find the information I needed in the "Boot State Machine" section of the reference manual.

User statistics

User Activity

Does HyperRAM require terminations?

Am I getting accurate results from the IBIS models? Is a rise time of 160 ps realistic for a GPIO at 1.8 V?

Does the BOOT0 pin have any use when using SBSFU?

HyperBus (OctoSPI) length matching

Can the STM32H723VGH6 implement an encrypted bootloader?

Re: HyperBus (OctoSPI) length matching

Re: HyperBus (OctoSPI) length matching

Re: Does HyperRAM require terminations?

Re: Am I getting accurate results from the IBIS models? Is a rise time of 160 ps realistic for a GPIO at 1.8 V?

Re: Does the BOOT0 pin have any use when using SBSFU?