VSC8211XVW Vitesse Semiconductor Corp, VSC8211XVW Datasheet - Page 127

• Manufacturer Part Number: VSC8211XVW
• Description: IC PHY 10/100/1000 SGL 117-LBGA
• Manufacturer: Vitesse Semiconductor Corp
• Type: PHY Transceiverr

Specifications of VSC8211XVW

• Number Of Drivers/receivers: 1/1
• Protocol: Gigabit Ethernet
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 117-LBGA
• Case: BGA
• Dc: 07+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 907-1023

VSC8211
Datasheet
20E.9 SDOP/SDON and SDIP/SDIN line impedance
These bits set the line impedance of the SDOP/SDON and SDIP/SDIN pins to 50Ω or 75Ω single ended (100Ω or 150Ω
differential).
20E.8 - CLKOUTMICRO Frequency
The frequency of the CLKOUTMICRO pin can be changed by using bit 20E.8.
20E.7:6 - Media Mode Status
Bits 20E.7:6 reflect the currently active media interface. These bits are most useful for determining the interface currently
selected by the Auto Media Sense function. If no link has been established, these bits are cleared.
20E.5 - SerDes Line Impedance
The internal termination impedance of the high speed serial interface inside the VSC8211 can be selected using bit 20E.5. This
applies to the SerDes/SGMII pins on the device. The reset value of this bit is determined by the SerDes Line Impedance bit in
the CMODE hardware configuration.
20E.4 - Enable Link Speed Auto-Downshift
When bit 20E.4 is set to a “1”, the VSC8211 will “downshift” the autonegotiation advertisement to 100BASE-TX after the number
of failed 1000BASE-T auto-negotiation attempts specified in bits 20E.3:2. The reset value of this bit is determined by the Link
Speed Downshift bit in the CMODE hardware configuration.
20E.3:2 - Link Speed Auto-Downshift Control
Bits 20E.3:2 determine the number of unsuccessful 1000BASE-T autonegotiation attempts that are required before the auto-
negotiation advertisement is “downshifted” to 100BASE-TX. These bits are valid only if bit 20E.4 is set.
20E.1 - Link Speed Auto-Downshift Status
When bit 20E.1 is set to a “1” and bit 20E.4 is set to a “1”, the current link speed is the result of a “downshift” to 100BASE-TX.
When bit 20E.1 is set to a “1” and bit 20E.4 is cleared, the current link requires a “downshift” in order to be established.
20E.0 - Reserved
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VMDS-10105 Revision 4.1
October 2006