IDT CPS Registers
Revision 1.5
Integrated Device Technology, Inc.
CPS-16/12/8 User Manual
10 - 21
July 10, 2012
10.5.3 Port 0 Local ACKID Command and Status Register
(PORT_0_LOCAL_ACKID_CSR)
Table 10.27 PORT_0_LOCAL_ACKID_CSR 0x000148
Bit
Field Name
Type
Reset
Value
Comment
4 - 0
OUTBOUND_ACKID
R/W
0b00000
The next transmitted ackID value for
the port. Writing this value can force
retransmission of outstanding unac-
knowledged packets in order to
manually implement error recovery
7 - 5
Reserved
12 - 8
OUTSTANDING_ACKID
R/W
0b00000
The output port unacknowledged
ackID status. The next acknowledge
control symbol ackID field that indi-
cates the ackID value expected in
the next received acknowledge con-
trol symbol
23 - 13
Reserved
28 - 24
INBOUND_ACKID
R/W
0b00000
Input port next expected ackID
30 - 29
Reserved
31
CLR_OUTSTANDING_ACKIDS
R/W
0b0
Writing a value of 1 to this bit causes
all outstanding unacknowledged
packets to be discarded. This bit
should only be written when trying to
recover a failed link. This bit will
always return a value of zero when
read.