VSC8211XVW Vitesse Semiconductor Corp, VSC8211XVW Datasheet - Page 161

• 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

33 Design Guidelines
These guidelines apply to Revision C of the VSC8211 silicon.
33.1 Required PHY Register Write Sequence
At initialization, a number of internal registers must be changed from their default values.
A series of register writes must be performed after device power-up or reset. These writes can be done using the EEPROM
connected to the EEPROM Interface or by the Switch/Station Manager.
The required register writes are as follows:
2A30h to PHY Register 31.
0212h to PHY Register 8.
52B5h to PHY Register 31.
000Fh to PHY Register 2.
472Ah to PHY Register 1.
8FA4h to PHY Register 0.
2A30h to PHY Register 31.
0012h to PHY Register 8.
0000h to PHY Register 31.
33.2 Interoperability with Intel 82547EI Gigabit Ethernet MAC+PHY IC
Due to a non-standard startup-sequence in the Intel 82547EI MAC+PHY IC, the VSC8211 might take multiple attempts to
establish link. The following PHY register write can be performed to avoid this issue:
0049h to MII Register 18.
33.3 SerDes Jitter
Under worst case conditions, total jitter performance may exceed the IEEE specifications for 1000BASE-X, as noted in the table
below. In typical applications with robust PCB design practices, however, actual performance is typically better than the figures
noted below.
VMDS-10105 Revision 4.1
October 2006
J
J
Symbol
(TOTAL, RX)
(TOTAL, TX)
Min
Typ
Table 74. SerDes Jitter
Max
290
400
161 of 165
Unit
ps
ps
Worst case total transmit jitter in media converter
applications.
Worst case total receive jitter tolerance in media
converter applications.
Parameter Description and Conditions
Datasheet
VSC8211