VSC8641XKO Vitesse Semiconductor Corp, VSC8641XKO Datasheet - Page 62

• 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

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