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7.3.7.
PCI and PCIe
Feature
Options
Description
PCI Common Settings
Info only
PCI Latency Timer
32 PCI Bus Clocks
64 PCI Bus Clocks
96 PCI Bus Clocks
128 PCI Bus Clocks
160 PCI Bus Clocks
192 PCI Bus Clocks
224 PCI Bus Clocks
248 PCI Bus Clocks
Select the PCI latency defined in PCI Bus clock cycles
VGA Palette Snoop
Disabled
Enabled
Allow PCI cards that do not contain their own VGA color palette to
access the video core’s palette
PERR#
Generation
Disabled
Enabled
Enables or Disables PCI Device to Generate PERR#.
SERR#
Generation
Disabled
Enabled
Enables/Disables PCI Device to Generate SERR#.
PCI Express Settings
Relaxed
Ordering
Disabled
Enabled
Enables/Disables PCI Express Device Relaxed Ordering.
Extended
Tag
Disabled
Enabled
If ENABLED allows Device to use 8-bit Tag field as a requester.
No
Snoop
Disabled
Enabled
Enables/Disables PCI Express Snoop option
Maximum
Payload
Auto
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
2048 Bytes
4096 Bytes
Select Maximum Payload size or let BIOS decide (Auto)
Maximum Read Request
Auto
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
2048 Bytes
4096 Bytes
Set Maximum Read Request Size of PCI Express Device or allow
System BIOS to select the value.
ASPM
Support
Warning: Enabling ASPM may cause some PCI-
E devices to fail
Disabled
Auto
Force L0S
Set the ASPM Level. Disabled - Disables ASPM.
Auto - BIOS auto configure
Force L0S - Force all links to L0s State
Extended
Synch
Enabled
Disabled
If enabled the generation of PCI Express synchronization patterns is
allowed
Link Training Retry
Disabled
2
3
5
Defines number of Retry Attempts software will take to retrain the
link if previous training attempt was unsuccessful.
Link Training Timeout (uS)
100
Defines number of microseconds software will wait before polling
'Link Training' bit in Link Status register. Value range from 10 to
10000 uS.
Unpopulated
Links
Keep Link ON
Disable
In order to save power, software will disable unpopulated PCI
Express links, if this option set to 'Disable Link'.
Содержание COM Express Express-BL
Страница 13: ...Express BL Page 13 2 17 Functional Diagram AB CD FDI DMI...
Страница 14: ...Page 14 2 18 Mechanical Dimensions...