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usb
3.0制器采用了qfn小尺封装，µpd720201封装尺8x8mm，µpd720202封装尺7x7mm，相比上代产品缩小50%。片支持从bios通过pci-e总线下载安装固件升级，不再需搭配外置闪存，降低了整个解决方的pcb面积和片数量。萨有效降低了片工作在低功耗态（未连接usb外设）的漏电流平，从而将低功耗态功率降至4.5mw，相比上代产品节电90%。通过改善数传送处理电路，使用外置硬盘等usb
3.0设备的实际传输速度相比上代µpd720200a可提升40%。品µpd720201可提供4个usb
3.0接口，µpd720202则2个。
feature
usb-if certified (test id = 30000001, 30000004)
compliant with the usb 2.0 specification
supports up to 4 downstream usb ports
integrated "transaction translator" with support for the new
"split transaction" protocol
designed for both bus-powered and self-powered
uses
automatically detects the upstream port speed. supports both
high-speed and full-speed hubs.
number of ports and power management are configurable via
external pins. no need for an external serial rom.
integrated overcurrent protection
supports led port status indicators
lead (pb) free, 48-pin tqfp package (7 x 7 mm, 0.5 mm
pitch)
lead (pb) free,fn package (6 x 6 mm, 0.5 mm
pitch)
whql certified for windows xp and windows 2000 (submission id
= 1025324)
driver support under microsoft® windows® driver support
specifications
usb 2.0 hub controller
compliant with the usb 2.0 specification (max. transfer rate:
480 mbps)
30mhz clock
3.3 v external operating voltage (2.5 v on-chip regulator for
core)
renesas usb host controller compliant with the usb 3.0 and
xhci (extensible host controller interface) specifications. the
system bus is compliant with the pcie gen2 specification. the
controller provides two or four usb ports with ls (low-speed) / fs
(full-speed) / hs (high-speed) / ss (superspeed) support.
相关产品：720201 , NEC , 720201 , D720201