The 8x930Hx USB microcontroller is based on the MCS(R) 251 microcontroller. It consists of standard
8XC251Sx peripherals plus a USB module. The USB module provides both USB hub and USB embedded
function capabilities. The 8x930Hx supports USB hub functionality, embedded function, suspend/resume
modes, isochronous/non-isochronous transfers, and it is fully USB rev 1.0 specification-compliant. The USB
module contains one internal and three 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 8x930Hx uses the standard instruction set of the MCS 251 architecture, which is binary code
compatible with the MCS 51 architecture.
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