Specifications
Table Of Contents
2 . PIN DEFINITIO NS
Note:
* Pins SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD, namely, GPIO6 to GPIO11 are connected
to the integrated SPI flash integrated on ESP01 and are not recommended for other uses.
Name No. Type Function
IO33 9 I/O
GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5,
TOUCH8, RTC_GPIO8
IO25
10
I/O
GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
IO26
11
I/O
GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
IO27
12
I/O
GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
IO14 13 I/O
GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,
HS2_CLK, SD_CLK, EMAC_TXD2
IO12 14 I/O
GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ,
HS2_DATA2, SD_DATA2, EMAC_TXD3
GND
15
P
Ground
IO13 16 I/O
GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID,
HS2_DATA3, SD_DATA3, EMAC_RX_ER
SHD/SD2*
17
I/O
GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD
SWP/SD3*
18
I/O
GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD
SCS/CMD*
19
I/O
GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS
SCK/CLK*
20 I/O
GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS
SDO/SD0* 21 I/O GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS
SDI/SD1* 22 I/O GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS
IO15 23 I/O
GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13,
HS2_CMD, SD_CMD, EMAC_RXD3
IO2 24 I/O
GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0,
SD_DATA0
IO0 25 I/O
GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1,
EMAC_TX_CLK
IO4 26 I/O
GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,
SD_DATA1, EMAC_TX_ER
IO16
27
I/O
GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
IO17
28
I/O
GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
IO5
29
I/O
GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
IO18
30
I/O
GPIO18, VSPICLK, HS1_DATA7
IO19
31
I/O
GPIO19, VSPIQ, U0CTS, EMAC_TXD0
NC
32
-
-
IO21 33 I/O GPIO21, VSPIHD, EMAC_TX_EN
RXD0 34 I/O GPIO3, U0RXD, CLK_OUT2
TXD0
35
I/O
GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2
IO22
36
I/O
GPIO22, VSPIWP, U0RTS, EMAC_TXD1
IO23
37
I/O
GPIO23, VSPID, HS1_STROBE
GND
38
P
Ground