VSC8541XMV-05 datasheet(60/101 Pages) MICROCHIP

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Registers

VMDS-10513 VSC8541-02 Datasheet Revision 4.1

4.4.2

EEE Control

The register at address 17E2 consists of the bits that provide additional control over the chip behavior in

energy-efficient Ethernet (IEEE 802.3az-2010) mode for debug.

7:4

10BASE-T signal amplitude trim3

R/W

Sticky bit.

10BASE-T signal amplitude

0000: 0%

0001: 0.9%

0010: 1.8%

0011: 2.7%

0100: 3.6%

0101: 4.5%

0110: 5.4%

0111: 6.1%

1000: –7.2%

1001: –6.3%

1010: –5.4%

1011: –4.5%

1100: –3.6%

1101: –2.7%

1110: –1.8%

1111: –0.9%

1000

3:0

10BASE-Te signal amplitude trim

R/W

Sticky bit.

10BASE-Te signal amplitude

0000: 0%

0001: 0.65%

0010: 1.3%

0011: 1.95%

0100: 2.6%

0101: 3.25%

0110: 3.9%

0111: 4.55%

1000: –5.2%

1001: –4.55%

1010: –3.9%

1011: –3.25%

1100: –2.6%

1101: –1.95%

1110: –1.3%

1111: –0.65%

1110

Changes to 1000BASE-T amplitude may result in unpredictable side effects.

Adjust 100BASE-TX to specific magnetics.

Amplitude is limited by VCC (2.5 V).

Table 59 •

EEE Control, Address 17E2 (0x11)

Bit

Name

Access Description

Default

Enable 10BASE-Te

R/W

Sticky bit.

Enable energy efficient (IEEE 802.3az-2010)

10BASE-Te operating mode.

14:12 Reserved

Reserved.

Table 58 •

Cu PMD Transmit Control, Address 16E2 (0x10) (continued)

Bit

Name

Access Description

Default

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