Espressif ESP01 Quick Start Manual page 10

4 . PERIPHERALS AND SENSORS
4. Peripherals and Sensors
4.1 Peripherals and Sensors Description
Interface
ADC
Ultra-Low Noise
Analog Pre-Amplifier
DAC
Touch Sensor
SD/SDIO/MMC Host
Controller
Espressif Systems
Table 7: Description of Peripherals and Sensors
Signal
ADC1_CH0
ADC1_CH3
ADC1_CH4
ADC1_CH5
ADC1_CH6
ADC1_CH7
ADC2_CH0
ADC2_CH1
ADC2_CH2
ADC2_CH3
ADC2_CH4
ADC2_CH5
ADC2_CH6
ADC2_CH7
ADC2_CH8
ADC2_CH9
SENSOR_VP
SENSOR_VN
DAC_1
DAC_2
TOUCH0
TOUCH1
TOUCH2
TOUCH3
TOUCH4
TOUCH5
TOUCH6
TOUCH7
TOUCH8
TOUCH9
HS2_CLK
HS2_CMD
HS2_DATA0
HS2_DATA1
HS2_DATA2
HS2_DATA3
Pin Function
SENSOR_VP
SENSOR_VN
IO32
IO33
IO34
IO35
IO4
IO0
Two 12-bit SAR ADCs
IO2
IO15
IO13
IO12
IO14
IO27
IO25
IO26
IO36 Provides about 60 dB gain by using larger
capacitors on PCB
IO39
IO25
Two 8-bit DACs
IO26
IO4
IO0
IO2
IO15
IO13
Capacitive touch sensors
IO12
IO14
IO27
IO33
IO32
MTMS
MTDO
IO2
Supports SD memory card V3.01 standard
IO4
MTDI
MTCK
9 ESP01 Datasheet V1.0