VSC8211XVW Vitesse Semiconductor Corp, VSC8211XVW Datasheet - Page 65

• 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

18.5 Connector Loopback
Connector Loopback allows for the twisted pair interface to be looped back externally. In this mode the PHY must be connected
to a loopback connector or a loopback cable. For this loopback, pair A should be connected to pair B and pair C to pair D. This
loopback will work in all speeds selected for the interface.
The autonegotiation, speed, and duplex can be configured using MII registers 0,4 and 9. For 1000BT connector loopback only
the following additional writes are required in the specific order.
1. Master/Slave configuration forced to Master (MII Register Bits 9.12:11 = 11)
2. Enable 1000BT connector loopback (MII Register 24.0 = 1)
3. Disable pair swap correction (MII Register Bit 18.5=1)
4. Disable autonegotiation and force 1000BT link (MII Register Bit 0.12=0, MII Register Bit 0.6=1, and MII Register Bit 0.12=0)
and force either full or half duplex (MII Register Bit 0.8=0 or 1).
This loopback is also available in the 100BASE-FX mode.
VMDS-10105 Revision 4.1
October 2006
Link Partner
CAT-5 or Fiber
C
A
B
D
VSC8211
Figure 33. Connector Loopback Block Diagram
Figure 32. Near-end Loopback Block Diagram
RX
TX
65 of 165
VSC8211
Transmit
Receive
Data
Data
RXD
TXD
MAC
MAC
Datasheet
VSC8211