The PDIUSBH11A is a universal serial bus hub that complies with USB 1.0 specification. It supports ACPI, OnNOW, and USB power management requirements. It is also compliant with USB Human Interface Devices and Monitor Control Class. The hub features four downstream ports with per packet connectivity and auto speed detection, supports up to 3 embedded functions, and has an integrated SIE, FIFO memory, and transceivers.