LP8557I 控制方式疑问

Dear TI 专家

您好

LP8557I 这款是控制方式是 PWM and I2C.
是不是可以用PWM 控制, 或者I2C控制
如果我们用PWM控制, I2C的接口如何接? 悬空? 接地?
如果我们用I2C控制, PWM的pin脚如何接?

谢谢

Wu JW：

你可以在Datasheet第3页，找到I2C口的设置方式。
Dual function pin. When I2C is not used (for example, BRTMODE = 00b), this pin can be used to set ƒSW and/or ƒPWM by connecting a resistor from this pin to a ground reference. When I2C is used (for FSET/SDA A3 I/O example, BRTMODE = 01, 10 or 11), connect this pin to an SDA line of an I2C bus. The LP8557 "PWM Only" device option uses this pin as an FSET pin. LP8557I "PWM and I2C" device option uses this pin as an SDA pin.

Johnsin Tao：

回复 Wu JW:

Hi二者选其一控制即可。