307013-003 Datasheet, PDF (475/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

UHCI Controllers Registers
11.1.14 INT_LN—Interrupt Line Register
(USB—D29:F0/F1/F2/F3)
Address Offset:
3Ch
Default Value:
00h
Attribute:
Size:
R/W
8 bits
Bit
Description
7:0
Interrupt Line (INT_LN) — RO. This data is not used by the Intel^® ICH7. It is to
communicate to software the interrupt line that the interrupt pin is connected to.
11.1.15 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 Config Registers:Offset 3108:bits 3:0)
D29IP.U1P (Chipset Config Registers:Offset 3108:bits 7:4)
Function 2
D29IP.U2P (Chipset Config Registers:Offset 3108:bits 11:8)
Function 3
D29IP.U3P (Chipset Config Registers:Offset 3108:bits 15:12)
NOTE: This does not determine the mapping to the PIRQ pins.
11.1.16 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 supports the USB Specification, Release 1.0.
Intel ^® ICH7 Family Datasheet
475