Slot capabilities – Altera Stratix V Avalon-ST User Manual
Page 50
Slot Capabilities
Table 4-9: Slot Capabilities
Parameter
Value
Description
Use Slot register
On/Off
The slot capability is required for Root Ports if a slot is implemented
on the port. Slot status is recorded in the
PCI Express Capabili-
ties
register. This parameter is only supported in Root Port mode.
Defines the characteristics of the slot. You turn on this option by
selecting Enable slot capability. The various bits are defined as
follows:
31
19 18 17 16 15 14
7 6 5
Physical Slot Number
No Command Completed Support
Electromechanical Interlock Present
Slot Power Limit Scale
Slot Power Limit Value
Hot-Plug Capable
Hot-Plug Surprise
Power Indicator Present
Attention Indicator Present
MRL Sensor Present
Power Controller Present
Attention Button Present
0
4 3 2 1
Slot power scale
0–3
Specifies the scale used for the Slot power limit. The following
coefficients are defined:
• 0 = 1.0x
• 1 = 0.1x
• 2 = 0.01x
• 3 = 0.001x
The default value prior to hardware and firmware initialization is
b’00. Writes to this register also cause the port to send the
Set_
Slot_Power_Limit
Message.
Refer to Section 6.9 of the PCI Express Base Specification Revision for
more information.
Slot power limit
0–255
In combination with the Slot power scale value, specifies the upper
limit in watts on power supplied by the slot. Refer to Section 7.8.9 of
the PCI Express Base Specification for more information.
Slot number
0-8191
Specifies the slot number.
Related Information
UG-01097_avst
2014.08.18
Slot Capabilities
4-13
Parameter Settings
Altera Corporation