![](http://datasheet.mmic.net.cn/340000/80931AA_datasheet_16452117/80931AA_2.png)
Advance Information Datasheet
module contains one internal and 4 external downstream ports and integrates the USB
transceivers, serial bus interface engine (SIE), hub interface unit (HIU), function interface unit
(FIU), and transmit/receive FIFOs. The 8
x
931AA is a hubless USB peripheral controller which
contains the same feature set as the 8
x
931HA hub controller except for the hub module. The
8
x
931AA/8
x
931HA Universal Serial Bus Peripheral Controller uses the standard instruction set
of the MCS
51 architecture.
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