ESP32-S3 max USB JTAG Speed for Firmware upload

[Jonathan2892]

ESP32-S3 max USB_JTAG Speed for Firmware upload

Hello all,

I am using the usb-jtag interface to upload my firmware to the esp32-s3.
Now I wonder if there is a way to increase the upload speed? Is there any hardware related limit?

I am using the VSCode esp-idf extension. In settings.json I can easily change teh baudrate for UART-flashing. But I think there is no option for changing the usb-jtag speed, since this comes from OpenOCD, right? From OpenOCD I get, that the clock speed for usb-jtag upload is 40000 kHz. Is this the upper limit?

Best,
Jonathan

[ESP_Sprite]

It's mostly limited by the latency of the JTAG commands combined with the speed of the SPI flash. You could try uploading via the serial interface of the USB-serial-JTAG instead, possibly that is faster.