DS90UB949A-Q1: DS90UB949 and DS90UB940.

Hello,

?? ? said:

1. Is it possible to control DS90UB949 using the I2C back channel of DS90UB940 from AP without using a separate control MCU for DS90UB949 as shown in the attached picture below?

Yes, this is possible.

?? ? said:

2. Is it possible to control LED on/off by inputting D_GPIO_0 of DS90UB940 and outputting D_GPIO_0 of DS90UB949?

Yes, this is also possible. Please see section 7.3.8.2 - Back Channel Configuration of the DS90UB940 datasheet for more information.

Best,

Nikolas