Intel C2518 FH8065501516710 Data Sheet
Product codes
FH8065501516710
Volume 2—PCI Express Root Ports (RP)—C2000 Product Family
Configuration of PCI Express Ports and Link Widths
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
238
Order Number: 330061-002US
The x16 lanes with four Controllers SKUs, x8 lanes with two Controllers SKUs, and
x4 lanes with one Controller SKU, use the Bifurcation Control 0 (BIFCTL0) to configure
the PCIe ports and lanes usage with default PCIe soft strap configuration. The x8 lanes
with four Controllers SKUs, requires using the PCIe soft strap configuration (soft
strap 0, soft strap 5, and soft strap 8) and combine with Bifurcation Control 0
(BIFCTL0) to configure the PCIe ports and lane usage described in
.
shows the supported PCIe lane reversal configurations for Various SKUs
1
.
Lane Reversal is determined during Link training.
Table 12-10. Lane Reversal Supported Mapping for Various SKUs
1.
See
to determine if the SKU chosen supports this configuration.
2.
Soft strap is the SoC strap configuration parameter defined in the Flash Descriptor located in the SPI
Flash Tool Intel
®
Atom™ Processor C2000 Product Family SPI Flash Programming Tools and Users Guide
- document number 519715.
3.
This specification requires eight PCIe lanes (out of the total available 16 lanes) to be disabled with soft
straps in the SPI Flash.
PCIe
CTRL
/Lane
Config
CTRL
/Lane
Config
Softstrap
2
0
PCIe RP Disable
RP4 RP3 RP2 RP1
Softstrap 8
PCIe RP Disable
RP4 RP3 RP2 RP1
Softstrap 5
PCIe Lane Power Enable
[15:12][11:8][7:4][3:0]
Softstrap 8
SlotWidth
12 bits total, 3 bits per RP
Bifurcation
Controller
Register
BIFCTL0
L
a
n
e
n
e
15
L
a
n
e
n
e
14
L
a
n
e
n
e
13
L
a
n
e
n
e
12
L
a
n
e
n
e
11
L
a
n
e
n
e
10
L
a
a
n
e
9
e
9
L
a
a
n
e
8
e
8
L
a
a
n
e
7
e
7
L
a
a
n
e
6
e
6
L
a
a
n
e
5
e
5
L
a
a
n
e
4
e
4
L
a
a
n
e
3
e
3
L
a
a
n
e
2
e
2
L
a
a
n
e
1
e
1
L
a
a
n
e
0
e
0
x16 Lanes with 4 Controllers SKUs
Base
3
0
3
0
3
0
3
0
4x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000
RP4
RP3
RP2
RP1
Lane Reveral
0
3
0
3
0
3
0
3
4x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000
RP4
RP3
RP2
RP1
Base
3
0
3
0
7
0
1x8, 2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
001
RP4
RP3
RP1
Lane Reveral
0
3
0
3
0
7
1x8, 2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
001
RP4
RP3
RP1
Base
7
0
3
0
3
0
2x4, 1x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
010
RP3
RP2
RP1
Lane Reveral
0
7
0
3
0
3
2x4, 1x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
010
RP3
RP2
RP1
Base
7
0
7
0
2x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
011
RP3
RP1
Lane Reveral
0
7
0
7
2x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
011
RP3
RP1
Base
16
0
1x16
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
100
Lane Reveral
0
16
1x16
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
100
x8 Lanes with 4 Controllers
3
SKUs
Base
1 0
1 0
1 0
1 0
4x2
default = 0000
default = 0000
default = FFFF
12'b010_010_010_010
000
RP4
RP3
RP2
RP1
Lane Reveral
0 1
0 1
0 1
0 1
4x2
default = 0000
default = 0000
default = FFFF
12'b010_010_010_010
000
RP4
RP3
RP2
RP1
x8 Lanes with 2 Controllers SKUs
Base
0
3
0
3
7
0
1x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
010 or 011
RP4
RP3
RP1
Lane Reveral
0
3
0
3
0
7
1x8
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
010 or 011
RP4
RP3
RP1
Base
3
0
3
0
3
0
3
0
2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000 or 001
RP4
RP3
RP2
RP1
Lane Reveral
0
3
0
3
0
3
0
3
2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000 or 001
RP4
RP3
RP2
RP1
x4 Lanes with 1 Controller SKUs
Base
3
0
3
0
3
0
3
0
2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000 or 010
RP4
RP3
RP2
RP1
Lane Reveral
0
3
0
3
0
3
3
0
2x4
default = 0000
default = 0000
default = FFFF
default = 0_0_0_0
000 or 010
RP4
RP3
RP2
RP1
RP1
RP1