Hi all,
There are some questions about TUSB4041 need your help.
Question 1: The 1.1V power supply is coming from 3.3V. According to datasheet, the GRSTz should be delay at least 3ms after 1.1V and 3.3V power supply stably. Could you please recommend the values of RC circuit to generate at least 3ms delay? I see there is only a 1uF capacitor connected to GRSTz pin. Is it ok to meet the requirements without resister?
Question 2: Yes. Customer wants to use LED to blink or keep turning on to indicate when D+/D- are busy. It’s not simply turn on when a USB device is connected to one down-stream port. So are there any pin on TUSB4041 can assert when data bus is busy after the device is connected? if not, how to implement this function?
Question 3: if customer doesn’t use EEPROM, is it ok to pull down SMBUSz (pin 7) with an external resister? After checking from datasheet, it seems ok to do that. Here want to double check with you. thanks.
BR,
Eric J
