876784 Intel, 876784 Datasheet - Page 272
876784
Manufacturer Part Number
876784
Description
Manufacturer
Intel
Datasheet
1.876784.pdf
(848 pages)
Specifications of 876784
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7.1.18
7.1.19
7.1.20
272
RP2D—Root Port 2 Descriptor Register
Offset Address: 0130–0133h
Default Value:
RP2BA—Root Port 2 Base Address Register
Offset Address: 0138–013Fh
Default Value:
RP3D—Root Port 3 Descriptor Register
Offset Address: 0140–0143h
Default Value:
31:24
23:16
63:32
31:28
27:20
19:15
14:12
31:24
23:16
15:2
11:0
15:2
Bit
Bit
Bit
1
0
1
0
Target Port Number (PN) — RO. This field indicates the target port number is 2h (root
port #2).
Target Component ID (TCID) — R/WO. This field returns the value of the ESD.CID
(offset 0104h, bits 23:16) field programmed by platform BIOS, since the root port is
in the same component as the RCRB.
Reserved
Link Type (LT) — RO. This bit indicates that the link points to a root port.
Link Valid (LV) — RO. When RPC.PC (offset 0224h, bits 1:0) is ‘01’, ‘10’, or ‘11’, or
FD.PE2D (offset 3418h, bit 17) is set, the link for this root port is not valid (return 0).
When RPC.PC is ‘00’ and FD.PE2D is cleared, the link for this root port is valid (return
1).
Reserved
Reserved
Bus Number (BN) — RO. This field indicates the root port is on bus #0.
Device Number (DN) — RO. This field indicates the root port is on device #28.
Function Number (FN) — RO. This field indicates the root port is on function #1.
Reserved
Target Port Number (PN) — RO. This field indicates the target port number is 3h (root
port #3).
Target Component ID (TCID) — R/WO. This field returns the value of the ESD.CID
(offset 0104h, bits 23:16) field programmed by platform BIOS, since the root port is
in the same component as the RCRB.
Reserved
Link Type (LT) — RO. This bit indicates that the link points to a root port.
Link Valid (LV) — RO. When RPC.PC (offset 0224h, bits 1:0) is ‘11’, or FD.PE3D
(offset 3418h, bit 18) is set, the link for this root port is not valid (return 0). When
RPC.PC is ‘00’, ‘01’, or “10’, and FD.PE3D is cleared, the link for this root port is valid
(return 1).
02xx0002h
00000000000E1000h
03xx0002h
Description
Description
Description
Attribute:
Size:
Size:
Attribute:
Size:
Attribute:
Chipset Configuration Registers
Intel
R/WO, RO
32-bit
RO
64-bit
R/WO, RO
32-bit
®
ICH7 Family Datasheet
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