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5.69 Port Link Maintenance Request CSR n (SPn_LM_REQ)
SRIO Registers
Each of the four ports is supported by a register of this type (see
). SPn_LM_REQ is shown in
and described in
Table 140. SPn_LM_REQ Registers and the Associated Ports
Register
Address Offset
Associated Port
SP0_LM_REQ
1140h
Port 0
SP1_LM_REQ
1160h
Port 1
SP2_LM_REQ
1180h
Port 2
SP3_LM_REQ
11A0h
Port 3
Figure 132. Port Link Maintenance Request CSR n (SPn_LM_REQ)
31
3 2
0
Reserved
COMMAND
R-0
R/W-000
LEGEND: R/W = Read/Write; R = Read only; -n = Value after reset
Table 141. Port Link Maintenance Request CSR n (SPn_LM_REQ) Field Descriptions
Bit
Field
Value
Description
31–3
Reserved
0
These read-only bits return 0s when read.
2–0
COMMAND
000b–111b
A write to this register generates a link-request control symbol on the corresponding
port interface. Command to be sent in the link-request control symbol. When read,
this field returns the last written value.
port interface. Command to be sent in the link-request control symbol. When read,
this field returns the last written value.
Serial RapidIO (SRIO)
200
SPRUE13A – September 2006