Bitfields for AMD-645 USB Miscellaneous Control 1 register:
Bit(s)	Description	)
 7	PCI memory commands
	0 support memory-read-line, memory-read-multiple, and
	  memory-write-and-invalidate
	1 memory read and memory write commands only
 6	do not disable port on EOF babble
 5	eanble PCI parity checking and PERR# generation
 4	reserved (0)
 3	USB data length
	0 allow TD length up to 1280 bytes
	1 limit to 1023
 2	enable USB power management
 1	DMA limited to 8-DW burst instead of 16-DW
 0	insert one PCI wait state
SeeAlso: #01046,#01048