VSC8641XKO Vitesse Semiconductor Corp, VSC8641XKO Datasheet - Page 53

• 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

4.2.20
Table 27.
Revision 4.3
August 2009
•
Extended PHY Control Set 1
The bits in the extended control set control the MAC auto-negotiation functioning,
SGMII alignment errors, and EEPROM status. The following table lists the settings
available.
Extended PHY Control 1, Address 23 (0x17)
Note After configuring bit 12 of the extended PHY control register set 1, a software
reset (register 0, bit 15) must be written to change the device operating mode. Bit 1
allows for flexibility in printed circuit board layouts because it can reorder the TXD pins.
Bit
15:13
12
11:9
8
7:6
5
4:2
1
0
When bits 11:0 are set to 00, the squelch threshold levels are based on the IEEE
standard for 10BASE-T. When set to 01, the squelch level is decreased, which may
improve the bit error rate performance on long loops. When set to 10, the squelch
level is increased and may improve the bit error rate in high-noise environments.
Name
Reserved
MAC interface mode
select
Reserved
RGMII skew timing
compensation
enable
Reserved
ActiPHY mode
enable
Reserved
GMII transmit pin
reversal
Reserved
Access
R/W
R/W
R/W
R/W
RO
RO
RO
RO
RO
Description
This is a super-sticky bit.
0 = GMII MAC interface mode.
1 = RGMII MAC interface mode.
This is a sticky bit.
0 = Disabled.
1 = Adds 1.7 ns delay to the RX_CLK and
TX_CLK pins.
Note There is a design consideration
associated with this register. For more
information, see
RGMII Timing Compensation Value,”
page 121.
This is a sticky bit.
1 = Enabled.
This is a sticky bit.
0 = GMII transmit pin order default.
1 = GMII transmit pin order reversed.
“Setting the Internal
VSC8641 Datasheet
Configuration
Default
Page 53
CMODE
CMODE
CMODE
0