Pci And Pcie - ADLINK Technology COM Express Express-BL User Manual

7.3.7.

PCI and PCIe

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