Custom ESP32-S3 board not programming

[msprauve]

Hello,
I have created a custom board using the ESP32-S3 at the core. The processor is configured to Joint Download Boot mode and I am using the USB pins for donwloading and console output. Using the ESP-IDE, I get the following output from the device and IDE console. What is strange is that it seems to be communicating with the device but it saying that it is not receiving any serial data. Can anyone point out what I am doing wrong...


Terminal Output (using the embedded terminal in the ESP-IDE)
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x15 (USB_UART_CHIP_RESET),boot:0x0 (DOWNLOAD(USB/UART0))
Saved PC:0x4004dc3b
waiting for download

Console Output
Serial port /dev/cu.usbmodem11201
Connecting...
Chip is ESP32-S3 (QFN56) (revision v0.2)
Features: WiFi, BLE, Embedded PSRAM 8MB (AP_3v3)
Crystal is 40MHz
MAC: cc:ba:97:18:70:44
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800

A fatal error occurred: No serial data received.

Here is my schematic

Screenshot 2025-01-24 at 10.42.49 AM.png (2.64 MiB) Viewed 739 times

[ESP_Sprite]

Are you sure you're using an ESP32-S3 variant with internal flash? A 'standard' ESP32S3 does not have that; you need to add external flash to it to do anything with it.

EDIT: esptool detects 8MiB integrated psram at 3.3V, so you have an ESP32-S3R8. Those do not have integrated flash.