Product parameters
Working voltage: 3.3V-5V
Communication interface: I2C interface
Product Descriptions
TCA9548 is an eight channel (bidirectional) I2C multi-channel expansion board module that allows a single host I2C bus to control eight independent I2C devices, enabling communication between multiple I2C devices with the same address. The module can be programmed and used through the microcontroller I2C interface, and can switch between eight different addresses,
| 引脚 Pin | 功能说明 Function Description |
| VIN | 接电源3.3V-5V Connect to a power supply of 3.3V-5V |
| GND | 接电源负极 Connect the negative pole of the power supply |
| SDA | 串行数据，接单片机SDA引脚 Serial data, connected to the SDA pin of the microcontroller |
| SCL | 串行时钟，接单片机SCL引脚 Serial clock, connected to the SCL pin of the microcontroller |
| RST | 低电平有效RST复位引脚 Low level effective RST reset pin |
| A0 | I2C 地址选择 I2C Address Selection |
| A1 | I2C 地址选择 I2C Address Selection |
| A2 | I2C 地址选择 I2C Address Selection |
| SD0、SC0 | I2C 0通道扩展接口 I2C 0 Channel Expansion Interface |
| SD1、SC1 | I2C 1通道扩展接口 I2C 1 Channel Expansion Interface |
| SD2、SC2 | I2C 2通道扩展接口 I2C 2 Channel Expansion Interface |
| SD3、SC3 | I2C 3通道扩展接口 I2C 3 Channel Expansion Interface |
| SD4、SC4 | I2C 4通道扩展接口 I2C 4 Channel Expansion Interface |
| SD5、SC5 | I2C 5通道扩展接口 I2C 5 Channel Expansion Interface |
| SD6、SC6 | I2C 6通道扩展接口 I2C 6 Channel Expansion Interface |
| SD7、SC7 | I2C 7通道扩展接口 I2C 7 Channel Expansion Interface |
RST is used to achieve reset, and A0 A1、A2, No connection required, default address is 0x70. If you need to change the address, you can switch between different addresses by connecting the three address bits A0, A1, and A2 to VIN or GND (high and low levels)
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