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VSC8221 Datasheet(PDF) 96 Page - Microsemi Corporation

Part # VSC8221
Description  Single Port 10/100/1000BASE-T PHY with1.25 Gbps SerDes for SFPs/GBICs
PDF  138 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8221 Datasheet(HTML) 96 Page - Microsemi Corporation

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VSC8221
Data Sheet
VMDS-10106 Revision 4.1
December 2006
96 of 106
106
23.2.30 Register 29 (1Dh) – Reserved
29.15:0 - Reserved
23.2.31 Register 30 (1Eh) - MAC interface Clause 37 Auto-Negotiation Control and Status
30.15 – Reserved
30.14 - Clause 37 Auto-Negotiation Disable
When bit 30.14 is set to a “1”, the clause 37 auto-negotiation state machine is disabled in the VSC8221. Bit 30.14 is cleared by
default.
Register 29 (1Dh) – Reserved
Bit
Name
Access
States
Reset Value
Sticky
15:0
Reserved
RO
00000000 00000000
Register 30 (1Eh) – MAC interface Clause 37 Auto-Negotiation Control and Status
Bit
Name
Access
States
Reset
Value
Sticky
15
Reserved
RO
0
14
Clause 37 Auto-Negotiation Disable R/W
1 = Disable clause 37 auto-negotiation
0 = Enable clause 37 auto-negotiation
0
S
13:12 MAC Remote Fault
RO
Correspond to remote fault bits sent by MAC
during clause 37 auto-negotiation
00
11
MAC Asymmetric Pause
RO
Corresponds to Asymmetric Pause bit sent by
MAC during clause 37 auto-negotiation
0
10
MAC Symmetric Pause
RO
Corresponds to Symmetric Pause bit sent by
MAC during clause 37 auto-negotiation
0
9
Clause 37 Restart Auto-Negotiaton
R/W
SC
1 = initiate restart of clause 37 auto-negotiation
0 = Normal operation
0
8
MAC Full Duplex
RO
Corresponds to Full Duplex Ability bit sent by
MAC during clause 37 auto-negotiation
0
7
MAC Half Duplex
RO
Corresponds to Half Duplex Ability bit sent by
MAC during clause 37 auto-negotiation
0
6
Reserved
RO
0
5
Clause 37 Auto-Negotiation Com-
plete
RO
1 = Clause 37 auto-negotiation has completed
successfully
0 = Clause 37 auto-negotiation has not completed
0
4
Reserved
RO
0
3
Link interlock Fail
RO
1 = Clause 37/28 auto-negotiation interlock could
not complete
0
2
Link interlock Complete
RO
1 = Clause 37/28 auto-negotiation interlock com-
pleted
0
1:0
RXLOS Pulse Delay1
1 in SGMii to CAT-5, Modified Clause 37 Auto-negotiation-Enabled PHY Operating modes, the RXLOS signal is always driven, regardless of the settings of Mii
Register 30.1:0. For more information about PHY operating modes, see Table 33, “PHY Operating Modes,” on page 86.
R/W
00 = 0ms (always stays low)
01 = 20ms
10 = 200ms
11 = 500ms
01



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