2. Pin Definitions
Note:
• Firmware can configure register bits to change the settings of ”Voltage of Internal LDO (VDD_SDIO)” and
”Timing of SDIO Slave” after booting.
• Internal pull-up resistor (R9) for MTDI is not populated in the module, as the flash and SRAM in ESP32-
WROOM-32UE only support a power voltage of 3.3 V (output by VDD_SDIO)
Espressif Systems 6 ESP32-WROOM-32UE User Manual V0.1
En
abling/Disabling Debugging Log Print over U0TXD During Booting
Fa
lling-edge Sampling
Fa
lling-edge Output
Fa
lling-edge Sampling
Ri
sing-edge Output
Ri
sing-edge Sampling
Fa
lling-edge Output
Ri
sing-edge Sampling
Ri
sing-edge Output