Product Info

Bluetooth Module Series
HC06U_Hardware_Design 15 / 31
3.2. Pin Description
Table 2: Pin Description
Pin
No.
Pin Description Functions
1 GND GND
2 3V3 +3.3 V power supply
3 BOOT0 Pull down into programming mode, hover or pull up into working mode
4 SWDIO Debug port: SWDIO
5 SWCLK Debug port: SWCLK
6 PA7 Pull up into sleep, pull down the wake device
7 SPI_CSB SPI communication port
8 SPI_CLK SPI communication port
9 SPI_MISO SPI communication port
10 SPI_MOSI SPI communication port
11 I2C_SCL I2C communication port
12 I2C_SDA I2C communication port
13 UART_CTS Clear to Send (active low)
14 CONN/DISC CONN/DISC
15 UART_RTS Request to Send (active low)
16 PB0 Configurable GPIO
17 PB1 Configurable GPIO
18 PB2 Configurable GPIO
19 RESET RESET (active low)
20 UART_RX UART data receive
21 UART_TX UART data transmission
22 ADC_IN4 Analog-digital conversion