Altera Cyclone V - Link; Slot

3–6 Chapter 3: Parameter Settings
Port Functions
Cyclone V Hard IP for PCI Express November 2011 Altera Corporation
Link
Table 3–4 describes the Link Capabilities parameters.
Slot
Table 3–12 describes the Slot Capabilities parameters.
Table 3–4. Link Capabilities 0x090
Parameter Value Description
Link port number 0x01
Sets the read-only value of the port number field in the
Link Capabilities
register.
Slot clock
configuration
On/Off
When On, indicates that the Endpoint or Root Port uses the same physical reference
clock that the system provides on the connector. When Off, the IP core uses an
independent clock regardless of the presence of a reference clock on the connector.
Table 3–5. Slot Capabilities 0x094
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 Capabilities Register . This parameter is
only valid for Root Port variants.
Slot Capability
register
Defines the characteristics of the slot. You turn this option on by selecting. The
various bits are defined as follows:
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 2.1 for more
information.
31 19 18 17 16 15 14
7
65
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
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