SYSREG has a VBUS current limiter that protects VBUS power sources.
The VBUS current limit (ILIM) applies when the device is in normal state. It is controlled by ISET and the result of USB port detection according to the following table. See the USB port detection and VBUS current limiting for more information about USB port type detection.
ISET | USB port | VBUS current limit (ILIM) |
---|---|---|
LOW | SDP | 100 mA |
LOW | DCP or CDP | 500 mA |
HIGH | Any | 500 mA |