VSC8641XKO Vitesse Semiconductor Corp, VSC8641XKO Datasheet - Page 20

• 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

3
3.1
Table 1.
Figure 3.
3.2
3.2.1
3.2.2
Revision 4.3
August 2009
Functional Descriptions
This section provides detailed information about how the VSC8641 device works, what
configurations and operational features are available, and how to test its functions. It
includes descriptions of the various device interfaces and how to set them up.
Operating Modes
The following table and illustration show the device operating modes and supported
media.
Operating Modes
RGMII or GMII to Cat5 Block Diagram
MAC Interface
The VSC8641 supports RGMII versions 1.3 and 2.0 and GMII/MII (2.5 V, 3.3 V) MAC
interfaces.
MAC Resistor Calibration
To simplify board design, the VSC8641 MAC interface uses SimpliPIN
self-calibrate to a desired impedance characteristic to eliminate the need for series
termination resistors. By default, these RX output pins calibrate to 50 Ω. In addition,
MII Register 19E, bits 15:14 can be used to select different target impedances. For
more information, see
RGMII MAC Interface Mode
The RGMII interface can support all three speeds (10 Mbps, 100 Mbps, and 1000 Mbps)
and is used as an interface to an RGMII-compatible MAC.
Operating Mode
RGMII — Cat5
GMII — Cat5
MAC
RGMII or
“MAC Resistor Calibration Control,”
MAC Interface
GMII
GMII / MII
RGMII
VSC8641
Supported Media
10/100/1000BASE-T
10/100/1000BASE-T
page 62.
Cat5
Functional Descriptions
VSC8641 Datasheet
TM
outputs that can
Link Partner
Cat5
Page 20