E-Keying
AXP1620 Shelf Description
AXP1620 Installation and Use (6806800E23E)
49
The blade slots are numbered physically from 1 to 16 going left to right along the front of the
shelf. Numbers on slots 1 and 16 designate the hub slots. Each slot also has a “logical” slot
number that defines it for backplane connectivity; logical slot numbers are not shown on the
shelf. The backplane functional layout is shown in the following figure.
2.6.2
E-Keying
The AXP1620 supports the shelf management infrastructure with a process called E-Keying. E-
Keying replaces the mechanical connector keying method used in earlier backplane designs.
E-Keying prevents damage to blades, prevents misoperation, and verifies fabric compatibility.
E-Keying entries are present as FRU information in the shelf FRU and all blades present in the
shelf. The E-Keying entries describe the Base Interface, Fabric Interface, Update Channel
Interface as implemented by the shelf and blades. E-keying allows blades that support different
PICMG 3 standards to be used in the same shelf.
More detailed information, such as connectivity and requirements for E-Keying can be found in
PICMG 3.0 R1.0 AdvancedTCA Specification and the
AXP1620 Subsystem IPMI
Programmer’s Reference
listed in
Appendix A,
Related Documentation
.
Figure 2-3
Backplane Power Segments
A3
B3
A4
B4
HUB A
1
1
A1
B1
HUB B
16
2
B2
A2
4
7
A1
B1
5
9
A1
B1
6
11
A1
B1
7
13
A1
B1
8
15
A1
B1
9
4
B2
A2
10
6
B2
A2
12
10
B2
A2
13
12
B2
A2
11
8
B2
A2
14
14
B2
A2
15
16
B2
A2
Power
Segments
Physical
Logical
ATCA
Blade Slots
Power
Segments
Lower FTM
Lower Rear
2
3
A1
B1
3
5
A1
B1
FTM 1
FTM 2
SAM B
SAM A
A
1
A
2
A
3
A
4
B
1
B
2
B
3
B
4
D1
C1
D1
C1
C1
D1
PEM A
PEM B
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