80KSBR200 Datasheet, PDF (74/172 Pages) Integrated Device Technology – sRIO SERIAL BUFFER FLOW-CONTROL DEVICE

IDT 80KSBR200
Notes
Advanced Datasheet*
Port 0 Link Maintenance Response CSR
The port 0 link maintenance response register is accessible both by a local processor and an external device. A read to
this register returns the status received in a link-response control symbol. This register is read-only.
Name: P0_LNK_MAINT_RES_CSRAddress: 0x000144
Bit
Field Name
Reset
Value
Comment
4:0
LNKS
9:5
ACKS
30:10
31
-
RVLD
0x00
0x00
0
1b0
Link Status:
link status field from the link-response control symbol.
ackID Status:
ackID status field from the link-response control symbol.
Reserved.
Response Valid:
If the link-request causes a link-response, this bit indicates that the
link-response has been received and the status fields are valid.
If the link-request does not cause a link-response, this bit indicates
that the link-request has been transmitted.
This bit automatically clears on read.
Note:
1.
Table 31 Port 0 Link Maintenance Response CSR
The above register is described in the RIO Specification Part 6, sec. 6.6.2.6
Port 0 Local ackID Status CSR
The port n local ackID status register is accessible both by a local processor and an external device. A read to this
register returns the local ackID status for both the output and input ports of the device. Care should be taken to use this
register only for hot swap and not software error management.
Name: P0_LOC_ACK_STAT_CSRAddress: 0x000148
Bit
Field Name
Reset
Value
Comment
4:0
OBACKID
7:5
-
12:8
OACKID
23:13
28:24
-
IACKID
31:29 -
0x00
0
0x00
0
0x00
0
Outbound Ack ID:
This can be written by software but only if there are no outstanding
unacknowledged packets. If there are, a newly-written value will be
ignored.
Reserved.
Outstanding port unacknowledge ackID status:
Next expected acknowledge control symbol ackID field that indicates
the ackID value expected in the next received acknowledge control
symbol. Note that this value is read-only even though RIO spec
allows for it to be writable.
Reserved.
Inbound ackID:
Input port next expected ackID value.
Reserved.
Note:
1.
Table 32 Port 0 Local ackID Status CSR
The above register is described in the RIO Specification Part 6, sec. 6.6.2.7
74 of 172
March 19, 2007
„2005 Integrated Device Technology, Inc. All rights reserved. Advanced Datasheet for informational purposes only. Product specifications subject to change without notice.NOT AN OFFER FOR SALE The information presented herein is subject to a
Non-Disclosure Agreement (NDA) and is for planning purposes only. Nothing contained in this presentation, whether verbal or written, is intended as, or shall have the effect of, a sale or an offer for sale that creates a contractual power of acceptance.