Short Problem Description:

I'm experiencing SPI speed limitations on RK3506B. When trying to achieve the documented 50 MHz SPI speed, the actual measured throughput only reaches about 30 Mbps maximum.

What I've tried:

Configured SPI0 in DTS with assigned-clock-rates = <100000000> and spi-max ...

I tried to connect it in different ways, I looked at the scheme. I did not receive a non-working usb. I don't have SR05.TC (USB ESD)
and FSUSB42UMX, and how can I replace them with simple elements? Can you draw a minimal connection diagram so that Usb works?

my goal is to use usb to flash the core1106 module from a PC. After the purchase, I have never been able to achieve normal usb operation. Every time I try, I get a device descriptor request failure. This error also persists when switching to firmware download mode (uboot->download). DN and DP are ...

USB does not want to work even with a USB_VBUSDET boost to 5v. I completely desoldered the USB_VBUSDET,USB_DN,and USB_DP pins from the module.I flashed the module via uart, but every time I turn it on, it cycles RKUART...... .The firmware was successful, I used LuckfoxPicoPi_W_EMC, I have 256MB and ...

USB doesn't want to work even with UVB_VBUSDET being tightened to 5v. I flashed the module via uart, but every time I turn it on, it cycles RKUART...... .The firmware was successful, I used LuckfoxPicoPi_W_EMC, I have 256MB and WIFI. Screen https://cdn.corenexis.com/view/?img=d/ma8/5iHmaT.png

Yes, I tried to make usb On the board for my projects, but when connecting to a PC there was always a 'Device descriptor request failure', DN and DP were connected correctly, USB_VBUS was also pulled up to 3v3, but still usb did not work. Right now it's just soldered, but not connected to a PC.

I have a CORE 1106, after I accidentally erased 0x0 to 0x1000 in uboot, the module board is constantly in boot mode(UARTKUARTKUARTK writes in debug uart........), even if you flash it, it will still write like this and will never exit the download mode. Npor is pulled up to 3 m3, SARADC(26) is ...