VSC8211XVW Vitesse Semiconductor Corp, VSC8211XVW Datasheet - Page 66

• 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

19 Hardware Configuration Using CMODE Pins
Each of the eight CMODE pins (CMODE[7:0]) are used to latch a four bit value at PHY reset. A total of thirty two CMODE
configuration bits are set at reset. Each CMODE bit represents the default value of a particular PHY register and therefore sets
a default PHY operating conditions at startup.
19.1 Setting the CMODE Configuration Bits
The CMODE bits are set by connecting each CMODE pin to either VDD33A or VSSS (ground) through an external 1% resistor.
The four bit value latched by the PHY on each CMODE pin depends upon the value of the resistor used to pull-up or pull-down
the CMODE pin. CMODE resistor values and connections are defined in the following table:
19.2 CMODE Bit descriptions
The following table outlines the mapping of each CMODE bit to a PHY operating condition parameter. Each of the PHY
operating condition parameters is described in detail in
VMDS-10105 Revision 4.1
October 2006
bit 3 value
CMODE
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
bit 2 value
CMODE
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 25. CMODE Pull-up/Pull-down Resistor Values
bit 1 value
CMODE
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table 27: “PHY Operating Condition Parameter
66 of 165
bit 0 value
CMODE
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Resistor Value
CMODE
2.26k
4.02k
5.90k
8.25k
12.1k
16.9k
22.6k
2.26k
4.02k
5.90k
8.25k
12.1k
16.9k
22.6k
0
0
Description”.
VDD33A or GND
VDD33A
VDD33A
VDD33A
VDD33A
VDD33A
VDD33A
VDD33A
VDD33A
Tied to
GND
GND
GND
GND
GND
GND
GND
GND
Datasheet
VSC8211