Espressif Systems ESP32-WROOM-32UE User Manual

PRE
LIMINARY
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
Bo
oting Mode
Pi
n
De
fault
SPI
Boot
Do
wnload Boot
GP
IO0
Pu
ll-up
1
0
GP
IO2
Pu
ll-down
Do
n’t-care
0
En
abling/Disabling Debugging Log Print over U0TXD During Booting
Pi
n
De
fault
U0
TXD Active
U0
TXD Silent
MT
DO
Pu
ll-up
1
0
Ti
ming of SDIO Slave
Pi
n
De
fault
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
MT
DO
Pu
ll-up
0
0
1
1
GP
IO5
Pu
ll-up
0
1
0
1

Espressif Systems ESP32-WROOM-32UE Specifications

General

Model	ESP32-WROOM-32UE
Category	Control Unit
Manufacturer	Espressif Systems
Chip	ESP32
Clock Speed	up to 240 MHz
Flash Memory	up to 16 MB
RAM	520 KB
PSRAM	up to 8 MB
Wi-Fi	802.11 b/g/n
Dimensions	18 mm x 25.5 mm x 3.1 mm
Antenna	PCB antenna
I2C	2
UART	3
Touch Sensors	10
Hall Effect Sensor	Yes
CPU	Dual-Core 32-bit LX6 Microprocessor
Bluetooth	Bluetooth v4.2 BR/EDR and BLE
Operating Voltage	3.0V to 3.6V
Operating Temperature	-40°C to +85°C
ADC	12-bit SAR ADC
DAC	2 x 8-bit DAC
Interfaces	SPI, I2C, UART, ADC, DAC