PEX 8532 Transparent Mode Port Registers
PLX Technology, Inc.
Register 11-29. 80h Slot Status and Control (All Ports) (Cont.)
Serial
EEPROM
Bit(s)
Description
Ports
Type
Default
Command Completed Interrupt Enable
Upstream
RO
No
0
Not valid for the upstream port.
0 = Function is disabled
4
1 = Enables software notification with a Hot Plug
interrupt when a command is completed by the
Hot Plug Controller on the corresponding PEX 8532
downstream port
Downstream
RW
Yes
0
Hot Plug Interrupt Enable
Upstream
Downstream
Upstream
RO
RW
RO
No
Yes
No
0
0
Not valid for the upstream port.
0 = Function is disabled
5
1 = Enables a Hot Plug Interrupt on enabled Hot Plug
events for the corresponding PEX 8532 downstream
port
Attention Indicator Control
00b
Do not change for upstream port.
Control the Attention Indicator on the corresponding
PEX 8532 downstream port slot.
00b = Reserved – Writes are ignored
01b = Turns On indicator to constant On state
10b = Causes indicator to blink
7:6
11b = Turns Off indicator
Downstream
RW
Yes
11b
Software must use a Byte or Word Write (and not
a DWord Write) to control the HP_ATNLEDx#
Output signal.
Reads return the corresponding PEX 8532
downstream port Attention Indicator’s current state.
186
ExpressLane PEX 8532AA/BA/BB/BC 8-Port/32-Lane Versatile PCI Express Switch Data Book
Copyright © 2007 by PLX Technology, Inc. All Rights Reserved – Version 1.6
PLX [ PLX TECHNOLOGY ]
