User's Manual

Pin Definitions
PIN Function Description
1 ANT WiFi Antenna
2 ADC
ADC, input range: 0V-1V
；
3 EN
Chip enable terminal. Active high: chip works normally;
Active low: chip close, very small current.
4 GPIO16 GPIO16
5 GPIO14 GPIO14; HSPI_CLK
6 GPIO12 GPIO12; HSPI_MISO
7 GPIO13 GPIO13; HSPI_MOSI; UART0_CTS
8 GPIO15 GPIO15; HSPI_CS; UART0_RTS
9 GPIO2
Also used as a programming flash UART1_TX
；
GPIO2
10 GPIO0 GPIO0; SPI_CS2
11 GPIO4 GPIO4
12 GND GND
13 GPIO9
PIHD
；
HSPIHD
；
GPIO9
14 GPIO10
SPIWP
；
HSPIWP
；
GPIO10
15 GPIO11
SPI_CS0
；
GPIO11
16 GPIO6
SPI_CLK
；
GPIO6
17 GPIO7
SPI_MSIO
；
GPIO7
18 GPIO8
SPI_MOSI
；
GPIO8
19 GPIO5 GPIO5
20 GND GND
21 RX
Also used as a programming flash UART Rx
；
GPIO3
22 TX
Also used as a programming flash UART Tx
；
GPIO1
；
SPI_CS1
23 3V3 Power supply
24 RESET
External reset
（
low active
）