1~8

P1_0~P0_7

Input or output terminal, push-pull structure, input as default.

输入或输出（推挽结构），默认输入。

9

GND

Ground. 地

10~17

P1_0~P1_7

Input or output terminal, push-pull structure, input as default.

输入或输出（推挽结构），默认输入。

18

AD0

I²C device address, connect to VCC or GND。

I²C器件地址选择，接VCC或GND。

19

SCL

I²C serial clock. I²C时钟

20

SDA

I²C serial data. I²C数据

21

VCC

Power supply. 电源输入端.

22

INTN

Interrupt output pin, open-drain, need external pull-up resistor; active low.

中断输出，开漏结构，需外部上拉电阻；低有效

23

AD1

I²C device address, connect to VCC or GND。

I²C器件地址选择，接VCC或GND。

24

AD2 (HTR3355, HTR3335)

RSTN (HTR3339)

AD2: I²C device address, connect to VCC or GND。

AD2: I²C器件地址选择，接VCC或GND。

RSTN: Hardware reset pin, active low.

RSTN: 硬件复位，低为复位

EP

GND

Provides both electrical and thermal connection from the device to the board. Connect to the system ground. 接地。