PEX 8532 Transparent Mode Port Registers
PLX Technology, Inc.
Register 11-2. 04h Command/Status (All Ports) (Cont.)
Serial
Default
Bit(s)
Description
Type
EEPROM
Received Target Abort
28
RO
No
No
0
0
Cleared to 0. It is never set to 1.
Received Master Abort
29
RO
Cleared to 0. It is never set to 1.
Signaled System Error
When the SERR# Enable bit is set to 1, the corresponding PEX 8532 port
sets this bit to 1 when it transmits an ERR_FATAL or ERR_NONFATAL
message to its upstream device.
This error is natively reported by the Device Status register Fatal Error Detected
and Non-Fatal Error Detected bits (offset 70h[18:17], respectively), which are
mapped to this bit for Conventional PCI backward compatibility.
30
RW1C
Yes
Yes
0
0
Detected Parity Error
Set to 1 when the corresponding port receives a Poisoned TLP on its primary
side, regardless of the Parity Error Response Enable bit state.
This error is natively reported by the upstream port’s Uncorrectable Error
Status register Poisoned TLP Status bit (offset FB8h[12]), which is mapped
to this bit for Conventional PCI backward compatibility.
31
RW1C
Register 11-3. 08h Class Code and Revision ID (All Ports)
Serial
EEPROM
Bit(s)
Description
Type
Default
Revision ID
Unless overwritten by the serial EEPROM, returns the silicon revision (AAh,
BAh, BBh, or BCh), the PLX-assigned Revision ID for this version of the
PEX 8532. The PEX 8532 Serial EEPROM register initialization capability
is used to replace the PLX Revision ID with another Revision ID.
AAh,
BAh,
Yes
(Refer
to Note)
7:0
RO
BBh,
Note: Silicon Revision BB only – Bit 0 is hardwired to 1 and is not
programmable by serial EEPROM.
or BCh
Silicon Revision BC only – Bits [2:0] are hardwired to 100b and are not
programmable by serial EEPROM.
Class Code
060400h
Programming Interface
15:8
RO
Yes
00h
PEX 8532 ports support the PCI-to-PCI Bridge r1.1 requirements, but not
subtractive decoding, on its upstream interface.
Sub-Class Code
23:16
31:24
RO
RO
Yes
Yes
04h
06h
PCI-to-PCI bridge.
Base Class Code
Bridge device.
156
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 ]
