Preliminary
Registers
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13.4.5.2 STATUS_COMMAND Register
The status and command register (STATUS_COMMAND) is described in the figure and table below.
Figure 13-75. STATUS_COMMAND Register
31
30
29
28
27
26
25
24
Parity Error
Signaled
Received
Received
Signaled Target
Reserved
Data Parity
System Error
Master Abort
Target Abort
Abort
Error
R/W1C-0
R/W1C-0
R/W1C-0
R/W1C-0
R/W1C-0
R-0
R/W1C-0
23
21
20
19
18
16
Reserved
Capabilities List
Interrupt Status
Reserved
R-0
R-1
R-0
R-0
15
11
10
9
8
Reserved
INTx Disable
Reserved
SERR Enable
R-0
R/W-0
R-0
R/W-0
7
6
5
3
2
1
0
Reserved
Parity Error
Reserved
Bus Master
Memory Space
IO Space
R-0
R/W-0
R-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; W1C = Write 1 to clear; -n = value after reset
Table 13-79. STATUS_COMMAND Register Field Descriptions
Bit
Field
Value
Description
31
Parity Error
0
Set if function receives poisoned TLP.
30
Signaled System
0
Set if function sends a ERR_FATAL or ERR_NONFATAL message and SERR enable bit is set to
Error
one.
29
Received Master
0
Set when a Requester receives a Completion with Unsupported Request Completion Status.
Abort
28
Received Target
0
Set when a Requester receives a Completion with Completer Abort Status.
Abort
27
Signaled Target
0
Set when a function acting as a Completer terminates a request by issuing Completer Abort
Abort
Completion Status to the Requester.
26-25
Reserved
0
Reserved
24
Data Parity Error
0
This bit is set by a Requester if the Parity Error Enable bit is set in its Command register and either
the condition that the requester receives a poisoned Completion or the condition that the requester
poisons a write request are true.
23-21
Reserved
0
Reserved
20
Capabilities List
1
For PCIe, this field must be set to 1.
19
Interrupt Status
0
Indicates that the function has received an interrupt.
18-11
Reserved
0
Reserved
10
INTx Disable
0
Setting this bit disables generation of INTx messages.
9
Reserved
0
Reserved
8
SERR Enable
0
When set, it enables System Error reporting to the Root Complex.
7
Reserved
0
Reserved
6
Parity Error
0
This bit controls whether or not the device responds to detected parity errors. If this bit is set, the
PCIESS will respond normally to parity errors. If this bit is cleared, the PCIES will ignore detected
parity errors.
5-3
Reserved
0
Reserved
2
Bus Master
0
Enables mastership of the bus.
1
Memory Space
0
This bit is set to enable the device to respond to memory accesses.
0
IO Space
0
This bit is set to enable the device to respond to I/O accesses. This functionality is not supported in
PCIESS and there this bit is set to zero.
1344
Peripheral Component Interconnect Express (PCIe)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
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