HBCU-5710R Datasheet, PDF (19/25 Pages) AVAGO TECHNOLOGIES LIMITED – Designed for Industry-Standard MSA-Compliant, Small Form Factor Pluggable (SFP) Ports

Table 16: Register 20 (Extended Control 2)
Bit
Name
Description
20.15 Link down on no idles 1 = Link lock lost
RO
0 = Link lock intact
20.14:4 N/A to SFP Module
R/W
Hardware
Reset
0
00011000110
20.3
Clause 37
R/W
Auto-Negotiation
Enable
20.2:0 N/A to SFP Module
R/W
0 = Disable BASE-X auto-negotiation 1
1 = Enable BASE-X auto-negotiation
000
Software
Reset
0
0001100110
Update
000
Details
If idle patterns are not seen
within 1 ms, link lock is lost
and link is brought down.
When writing to register 20,
be sure to preserve the values
of these bits. Changes to these
values can interrupt the normal
operation of the SFP module.
Changes to this bit take effect
after software reset.
When writing to register 20,
be sure to preserve the values
of these bits. Changes to these
values can interrupt the normal
operation of the SFP module.
Table 17: Register 21 (Receive Error Counter)
Bit
Name
Description
Hardware
Reset
21.15:0 Receive errors
RO/SC
Counts errors received on the 1000BASE-T 0
side
Software
Reset
0
Details
These bits do not roll-over when
they are all one’s.
Table 18: Register 22 (Cable Diagnostic 1)
Bit
22.7:0
R/W
22.15:8
RO
22.1:0
R/W
Name
BASE-X/ BASE-TAuto-
Negotiation Register
Select
N/A to SFP Module
MDI Pair Select
Description
00000000= Registers 0-1, 14-8 and
17-19 are BASE-T values00000001=
Registers 0-1, 14-8 and 17-19 are BASE-
X values
Hardware
Reset
00000000
00 = Pins 1 & 2 (Channel A)
00
01 = Pins 3 & 6 (Channel B)
10 = Pins 4 & 5 (Channel C)
11 = Pins 7 & 8 (Channel D)
Software
Reset
Retain
Retain
Details
Overlapping usage with VCT (see
below)
For VCT results, choose the
twisted pair on which register 28
will display.
19