VSC8641XKO Vitesse Semiconductor Corp, VSC8641XKO Datasheet - Page 62
VSC8641XKO
Manufacturer Part Number
VSC8641XKO
Description
IC PHY 10/100/1000 100-LQFP
Manufacturer
Vitesse Semiconductor Corp
Type
PHY Transceiverr
Specifications of VSC8641XKO
Number Of Drivers/receivers
1/1
Protocol
Gigabit Ethernet
Voltage - Supply
2.5V, 3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Case
TQFP
Dc
07+
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
907-1031
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4.3.5
Table 40.
4.3.6
Table 41.
Revision 4.3
August 2009
MAC Resistor Calibration Control
The following table lists the settings available.
MAC Resistor Calibration Control, Address 19E (0x13)
Extended PHY Control 3
Register 20E controls the ActiPHY sleep timer, its wake-up timer, the frequency of the
CLKOUT signal, and its link speed downshifting feature. The following table lists the
settings available.
Extended PHY Control 3, Address 20E (0x14)
Bit
15:14
13:0
Bit
15
14:13
12:11
10:9
8:6
5
4
3:2
Name
MAC resistor
calibration control
setting
Name
Reserved
ActiPHY sleep timer
Reserved
ActiPHY link status
time-out control
Reserved
MAC RX_CLK
Disable
Enable link speed
auto-downshift
feature
Link speed
auto-downshift
control
Reserved
Access Description
Access
R/W
R/W
R/W
R/W
R/W
RO
RO
RO
R/W
RO
This is a sticky bit.
00 = 1 second.
01 = 2 seconds.
10 = 3 seconds.
11 = 4 seconds.
00 = 1 second.
01 = 2 second.
10 = 3 second.
11 = 4 second.
1 = RX_CLK is held low.
0 = RX_CLK is in normal operation.
This is a sticky bit.
1 = Enable auto link speed downshift from
1000BASE-T.
This is a sticky bit.
00 = Downshift after two failed 1000BASE-T
auto-negotiation attempts.
01 = Downshift after three failed 1000BASE-T
auto-negotiation attempts.
10 = Downshift after four failed 1000BASE-T
auto-negotiation attempts.
11 = Downshift after five failed 1000BASE-T
auto-negotiation attempts.
Description
This is a sticky bit.
00 = 50 Ω.
01 = 60 Ω.
10 = 30 Ω.
11 = 45 Ω.
VSC8641 Datasheet
Configuration
Default
CMODE
Default
Page 62
CMODE
01
01
01
0