Flash; Uart - Espressif Systems ESP32-C6 Series Hardware Design Manuallines

3 PCB Layout Design
Figure 22: ESP32-C6 Stub in a Four-layer PCB Design

3.6 Flash

Place the zero-ohm series resistors on the SPI lines close to the chip. Route the SPI traces on the inner layer
(e.g., the third layer), add ground copper and ground vias around the clock and data traces of SPI separately
whenever possible.
Figure 23: ESP32-C6 Flash Layout

3.7 UART

The series resistor on the U0TXD trace needs to be placed close to the chip and away from the crystal. The
U0TXD and U0RXD traces on the top layer should be as short as possible, surrounded by ground copper and
ground vias.
Espressif Systems 26
ESP32-C6 Series Hardware Design Guidelines v1.0
Submit Documentation Feedback