82801FB Datasheet, PDF (513/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

UHCI Controllers Registers
13.1.15
INT_PN—Interrupt Pin Register
(USB—D29:F0/F1/F2/F3)
Address Offset:
Default Value:
3Dh
Attribute:
Function 0: See Description Size:
Function 1: See Description
Function 2: See Description
Function 3: See Description
RO
8 bits
Bit
Description
Interrupt Line (INT_LN) — RO. This value tells the software which interrupt pin each USB host
controller uses. The upper 4 bits are hardwired to 0000b; the lower 4 bits are determine by the
Interrupt Pin default values that are programmed in the memory-mapped configuration space as
follows:
Function 0
7:0 _{Function 1}
D29IP.U0P (Chipset Configuration Registers:Offset 3108:bits 3:0)
D29IP.U1P (Chipset Configuration Registers:Offset 3108:bits 7:4)
Function 2
D29IP.U2P (Chipset Configuration Registers:Offset 3108:bits 11:8)
Function 3
D29IP.U3P (Chipset Configuration Registers:Offset 3108:bits 15:12)
NOTE: This does not determine the mapping to the PIRQ pins.
13.1.16
USB_RELNUM—Serial Bus Release Number Register
(USB—D29:F0/F1/F2/F3)
Address Offset:
60h
Default Value:
10h
Attribute:
Size:
RO
8 bits
Bit
Description
Serial Bus Release Number — RO.
7:0
10h = USB controller is compliant with the USB Specification, Release 1.0.
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
513