VSC8211XVW Vitesse Semiconductor Corp, VSC8211XVW Datasheet - Page 73

• 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

20.1 Programming Multiple VSC8211s Using the Same EEPROM
To prevent contention on the 2 wire bus when multiple PHYs use the same EEPROM for initialization, the EEPROM start-up
block of each VSC8211 monitors the bus for (PHY Address[4:0] + 1) * 9 + 92 clock cycles for no bus activity and only then
attempts to access the EEPROM bus. PhyAddress[4:0] is chosen because these are the PHY Address bits that are unique to
each VSC8211. (i.e VSC8211 with lowest PHY Address gets priority on this bus.)
NOTE: The same clock must be used for each VSC8211’s REFCLK input. In addition, the RESET pin for each VSC8211 must
be driven from the same source to ensure that the reference clock modes within each device are correctly set.
This prevents using the CLKOUTMAC or CLKOUTMICRO output from one VSC8211 to drive the clock input of another
VSC8211, if the devices are sharing the same EEPROM.
VMDS-10105 Revision 4.1
October 2006
{bpage_addr3,s_
addr3} = O
-------------
-------------
-------------
-------------
Address
O+7
O+6
O+5
O+4
O+3
O+2
O+1
Table 28. Configuration EEPROM Data Format
R E S E T
S o u r c e
Figure 34. EEPROM Interface Connections
V S C 8 2 1 1
( 1 )
----------------------------------------------------
----------------------------------------------------
----------------------------------------------------
----------------------------------------------------
Data to be written (MSB)
RegAddress b
Data to be written (MSB)
RegAddress a
Number of PHY Register writes *3[15:8]
Data to be written (LSB)
Data to be written (LSB)
Number of PHY Register writes *3[7:0]
S D A
S C L
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E E P R O M
R E F C L K
S o u r c e
Contents
V S C 8 2 1 1
( 2 )
Datasheet
VSC8211