IDT 89HPES24N3A, User Manual

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IDT Configuration Registers
PES24N3A User Manual 9 - 30 April 10, 2008
Notes
PCIESSTS - PCI Express Slot Status (0x05A)
9:8 PIC RW 0x1 Power Indicator Control . When read, this register returns
the current state f the Power Indicator. Writing to this regis-
ter sets the indicator.
This bit is read-only and has a value of zero when the corre-
sponding capability is not enabled in the PCIESCAP regis-
ter.
This field is always zero if the PWRIP bit is cleared in the
PCIESCAP register.
0x0 -(reserved) Reserved
0x1 -(on) On
0x2 -(blink) Blink
0x3 -(off) Off
This field has no effect on the upstream port.
10 PCC RW 0x0 Power Controller Control . When read, this register returns
the current state of the power applied to the slot. Writing to
this register sets the power state of the slot.
This bit is read-only and has a value of zero when the corre-
sponding capability is not enabled in the PCIESCAP regis-
ter.
0x0 -(on) Power on
0x1 -(off) Power off
11 EIC RW 0x0 Electromechanical Interlock Control . This field always
returns a value of zero when read. If an electromechanical
interlock is implemented, a write of a one to this field causes
the state of the interlock to toggle and a write of a zero has
no effect.
This bit is read-only and has a value of zero when the corre-
sponding capability is not enabled in the PCIESCAP regis-
ter.
12 DLLLASCE RW 0x0 Data Link Layer Link Active State Change Enable . This
bit when set enables generation of a Hot-Plug interrupt or
wake-up even on a data link layer active field state change.
15:13 Reserved RO 0x0 Reserved field.
Bit
Field
Field
Name
Type
Default
Value
Description
0 ABP RW1C 0x0 Attention Button Pressed . Set when the attention button is
pressed.
1 PFD RW1C 0x0 Power Fault Detected . Set when the Power Controller
detects a power fault.
2 MRLSC RW1C 0x0 MRL Sensor Changed . Set when an MRL Sensor state
change is detected.
3 PSD RW1C 0x0 Presence Detected Changed . Set when a Presence
Detected change is detected.
4 CC RW1C 0x0 Command Completed . This bit is set when the Hot-Plug
Controller completes an issued command.
5 MRLSS RO 0x0 MRL Sensor State . This field enclosed the current state of
the MRL sensor.
0x0 -(closed) MRL closed
0x1 -(open) MRL open
Bit
Field
Field
Name
Type
Default
Value
Description