LAN8810 datasheet(26/83 Pages) MICROCHIP

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LAN8810/LAN8810I

DS00001870B-page 26

 2009-2015 Microchip Technology Inc.

3.8.2

SOFTWARE CONFIGURATION

The Serial Management Interface (SMI) allows for the configuration and control of multiple transceivers. Several 16-bit

status and control registers are accessible through the management interface pins MDC and MDIO for 10/100/

1000Mbps operation. The device implements all the required MII registers and optional registers as described in Section

4.0, "Register Descriptions". Configuring the SMI address is described in Section 3.8.1.2.1. Refer to Section 3.4, "Serial

Management Interface (SMI)," on page 20 for additional information on the SMI.

3.9

Miscellaneous Functions

3.9.1

LEDS

The device provides the following LED signals to enable visual indication of status:

• 1000_LED

• 100_LED

• 10_LED

•ACT_LED

In all modes, the Full Duplex LED (ACT_LED) is driven immediately after auto-negotiation has resolved the duplex state

and before the link is established. The Speed LEDs (1000_LED, 100_LED, 10_LED) are driven after a link is estab-

lished. Three LED modes of operation are available:

• LED Mode 1 (Table 3-11)

• LED Mode 2 (Table 3-12)

• LED Mode 3 (Default Mode - Table 3-13)

TABLE 3-10:

Reg 19

[15:11]

Mode Definitions

Reg 0

[13,12,8,6]

Reg 4

[8,7,6,5]

Reg 9

[12,11,10,9,8]

00000

10BASE-T Half Duplex. Auto-negotiation disabled.

0000

XXXX

XXX00

00001

10BASE-T Full Duplex. Auto-negotiation disabled.

0010

XXXX

XXX00

00010

100BASE-TX Half Duplex. Auto-negotiation disabled.

CRS is active during Transmit & Receive.

1000

XXXX

XXX00

00011

100BASE-TX Full Duplex. Auto-negotiation disabled.

CRS is active during Receive.

1010

XXXX

XXX00

00100

10BASE-T/100BASE-TX capable. Auto-negotiation enabled.

11X0

1111

XXX00

00101

RESERVED

---

00110

RESERVED

---

00111

All capable. Auto-negotiation enabled.

Auto master/slave resolution single port.

01X1

1111

00011

01000

RESERVED

---

01001

All capable. Auto-negotiation enabled.

Manual master/slave resolution slave port.

01X1

1111

10011

01010

All capable. Auto-negotiation enabled.

Manual master/slave resolution master port.

01X1

1111

11111

01011 -

11111

RESERVED

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