Datasheet

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DP83849C

7.2.7 10 Base-T Status/Control Register (10BTSCR)

This register is used for control and status for 10BASE-T device operation.

LED_CNFG[1]

LED_CNFG[0]

0, RW

Strap, RW

LED Configuration

In Mode 1, LEDs are configured as follows:

LED_LINK = ON for Good Link, OFF for No Link

LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s

LED_ACT/LED_COL = ON for Activity, OFF for No Activity

In Mode 2, LEDs are configured as follows:

LED_LINK = ON for good Link, BLINK for Activity

LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s

LED_ACT/LED_COL = ON for Collision, OFF for No Collision

Full Duplex, OFF for Half Duplex

In Mode 3, LEDs are configured as follows:

LED_LINK = ON for Good Link, BLINK for Activity

LED_SPEED = ON in 100 Mb/s, OFF in 10 Mb/s

LED_ACT/LED_COL = ON for Full Duplex, OFF for Half Duplex

4:0 PHYADDR[4:0] Strap, RW PHY Address: PHY address for port.

Table 39. 10Base-T Status/Control Register (10BTSCR), address 1Ah

Bit Bit Name Default Description

15 10BT_SERIAL Strap, RW 10Base-T Serial Mode (SNI)

1 = Enables 10Base-T Serial Mode

0 = Normal Operation

Places 10 Mb/s transmit and receive functions in Serial Network

Interface (SNI) Mode of operation. Has no effect on 100 Mb/s

operation.

14:12 RESERVED 0, RW RESERVED:

Must be zero.

11:9 SQUELCH 100, RW Squelch Configuration:

Used to set the Squelch ‘ON’ threshold for the receiver.

Default Squelch ON is 330mV peak.

Table 38. PHY Control Register (PHYCR), address 19h (Continued)

Bit Bit Name Default Description

LED_CNFG[1] LED_ CNFG[0] Mode Description

Don’t care 1 Mode 1

00Mode 2

10Mode 3