I'm using the ESP32-S3FH4R2 in a new project. This is the variant which has 4MB internal flash and 2MB internal RAM.
Received the new prototype boards and the ESP32 appears "dead" so I've obviously connected something wrong somewhere. Nothing comes up on UART0 (literally nothing, no trace on TXD0 either) and I'm not getting any oscillator on XTAL_P and XTAL_N. All connected VDDs are measured 3.3v. PU is pulled high. Schematic attached. I have a couple of trouble shooting questions:
- With the S3FH4R2 variant, is VDD_SPI required to be connected to an external 3.3V voltage source? Docs are a little unclear here and I've currently got this pin floating
- can SPICLK_N and SPICLK_P be used as GPIO?