10. Registers > LP-Serial Extended Features Registers with Software Assisted Error Recovery
CPS-1848 User Manual
233
June 2, 2014
Formal Status
This document is confidential and is subject to an NDA.
Integrated Device Technology
10.5.6
Port {0..17} Link Maintenance Response CSR
For base address information, see
Port {0..17} S-RIO Extended Features Base Addresses
Register Name: PORT_{0..17}_LINK_MAINT_RESP_CSR
Reset Value: 0x0000_0000
Register Offset: 0x (0x20 * port_num)
Bits
0
1
2
3
4
5
6
7
00:07
VALID
Reserved
08:15
Reserved
16:23
Reserved
ACKID_STATUS
24:31
ACKID_STATUS
LINK_STATUS
Bits
Name
Description
Type
Reset
Value
0
VALID
If the previous Link-Request causes a Link-Response, then this
bit indicates that the Link-Response has been received and the
status fields are valid. If the Link-Request did not cause a
Link-Response, this bit indicates that the Link-Request has been
transmitted. This bit clears on read.
RR
0
1:20
Reserved
Reserved
RO
0
21:26
ACKID_STATUS
ackID status field from the Link-Response control symbol. The
value of the next ackID expected by the receiver.
Note: Bit 21 is available only when IDLE2 is in use on the link.
RO
0
27:31
LINK_STATUS
Link status field from the Link-Response control symbol
0b00010 = Error
0b00100 = Retry-stopped
0b00101 = Error-stopped
0b10000 = OK
All others are Reserved
RO
0b00000