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VSC8504-02 Datasheet(PDF) 78 Page - Microsemi Corporation

No. de pieza VSC8504-02
Descripción Electrónicos  Quad-Port 10/100/1000BASE-T PHY with Synchronous Ethernet and QSGMII/SGMII MAC
PDF  131 Pages
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Fabricante Electrónico  MICROSEMI [Microsemi Corporation]
Página de inicio  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8504-02 Datasheet(HTML) 78 Page - Microsemi Corporation

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Registers
VMDS-10507 VSC8504-02 Datasheet Revision 4.2
67
4.4.1
Cu PMD Transmit Control
The register at address 16E2 consists of the bits that provide control over the amplitude settings for the
transmit side Cu PMD interface. These bits provide the ability to make small adjustments in the signal
amplitude to compensate for minor variations in the magnetics from different vendors. Extreme caution
must be exercised when changing these settings from the default values as they have a direct impact on
the signal quality. Changing these settings also affects the linearity and harmonic distortion of the
transmitted signals. For help with changing these values, contact your Microsemi representative.
Table 56 •
Cu PMD Transmit Control, Address 16E2 (0x10)
Bit
Name
Access Description
Default
15:12 1000BASE-T signal
amplitude trim(1)
R/W
Sticky bits.
1000BASE-T signal amplitude
1111: -1.7%
1110: -2.6%
1101: -3.5%
1100: -4.4%
1011: -5.3%
1010: -7%
1001: -8.8%
1000: -10.6%
0111: 5.5%
0110: 4.6%
0101: 3.7%
0100: 2.8%
0011: 1.9%
0010: 1%
0001: 0.1%
0000: -0.8%
0000
11:8
100BASE-TX signal
amplitude trim(2)
R/W
Sticky bits.
100BASE-TX signal amplitude
1111: -1.7%
1110: -2.6%
1101: -3.5%
1100: -4.4%
1011: -5.3%
1010: -7%
1001: -8.8%
1000: -10.6%
0111 5.5%
0110: 4.6%
0101: 3.7%
0100: 2.8%
0011: 1.9%
0010: 1%
0001: 0.1%
0000: -0.8%
0010



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