80ksbr200 Integrated Device Technology, 80ksbr200 Datasheet - Page 23

• Manufacturer Part Number: 80ksbr200
• Description: Srio Serial Buffer Flow-control Device
• Manufacturer: Integrated Device Technology

„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.
IDT 80KSBR200
Notes
returned to the sender of the request and include a "status" of the request. The status is identified in
sRIO input/Output Logical spec. The SerB shall observe that 0000b indicates "done" and 0111b indicates "error".
a read request, the Payload is the data content of the selected configuration register. When initiating a Maintenance
Response Packet, the hop count will be set to 0xFF.
The sRIO maintenance request packet will receive a response packet as shown in
Other than the status field of the packet, the fields serve the same function as the request packet or are unused. Upon
The fields of the response packet are as follows:
0
0
transaction
transaction
1
AckID
1
AckID
2
AckID = Transaction ID for link acknowledgements
CRF = Critical Request Flow, not used in SerB
prio = Packet priority
tt = Transaction type, 00 = 8 bits, 01 = 16 bits
fType = 1000, for a type 8 maintenance packet
Target ID = the destination ID of the SerB, is 16 bits if tt = 01
Source ID = the ID of the sending device, is 16 bits if tt = 01
transaction = specifies whether request is read, write and/or response, see sect 4.1.10 of sRIO Input/Output
Logical spec
rdsize/wrsize = see sect 4.1.2 of sRIO Input/Output Logical spec
srcTID = the Transaction ID for sRIO end to end retransmissions
Hop Count = Not important to an end point.
config_offset = the configuration register address
wdptr = part of rdsize/wrsize
Payload = 32 bits of data destined to be written to the designated register
CRC = 16 bits of CRC
2
AckID = Transaction ID for link acknowledgements
CRF = The incoming CRF is returned in the response
prio = Increased to one higher than the request
tt = Same as the request
fType = Same as the request (8)
Target ID = The Source ID of the request (a simple swap)
Source ID = The Target ID of the request (a simple swap)
transaction = specifies whether request is read, write and/or response, see sect 4.1.10 of sRIO Input/Output
Logical spec
status = 0000b means done, 0111b means error
3
3
4
4
rsvd
rsvd
rdsize/wrsize
rdsize/wrsize
config_offset
config_offset
5
5
6
6
CRF
CRF
Payload
Payload
7
7
8
8
prio
prio
Figure 8 sRIO Maintenance Response Packet (Type 8)
Figure 7 sRIO Maintenance Request Packet (Type 8)
9
9
10
10
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tt
tt
11
11
srcTID
srcTID
12
12
wdptr
wdptr
13
13
fType
fType
14
14
rsrv
rsrv
15
15
16
16
17
17
18
18
Hop Count
Hop Count
Target ID
Target ID
19
19
20
20
21
21
22
22
Payload
Payload
23
23
CRC
CRC
Figure
24
24
25
25
Advanced Datasheet*
8. The response will be
26
26
config_offset
config_offset
Source ID
Source ID
27
27
section 4.1.10
March 19, 2007
28
28
29
29
30
30
31
31
of the