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TLK105 Datasheet(PDF) 12 Page - Texas Instruments

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Part # TLK105
Description  Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer Transceiver
PDF  99 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLK105 Datasheet(HTML) 12 Page - Texas Instruments

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470W
2.2kW
V
CC
AN_O = 1
TLK105
TLK106
SLLSEB8A – AUGUST 2012 – REVISED MARCH 2013
www.ti.com
3.8
LED Interface
The TLK10x supports one configurable Light Emitting Diode (LED) pin. The device supports 2 LED
configurations: Link and Activity. Functions are multiplexed into two modes. The LED can be controlled by
configuration pin and internal register bits. Bit 5 of the PHY Control register (PHYCR) selects the LED
mode as described in Table 3-3.
Table 3-3. LED Mode Select
LED_CFG[0]
Mode
LED_LINK
(bit 5) or (pin 27)
ON for Good Link
1
1
OFF for No Link
ON for Good Link
2
0
BLINK for Activity
The LED_LINK pin in Mode 1 indicates the link status of the port. The LED is OFF when no link is present.
In Mode 2 it is ON to indicate that the link is good; BLINK indicates that activity is present on either
transmit or receive channel. Bits 10:9 of the LEDCR register (0x18) control the blink rate. The default blink
rate is 5Hz.
See Figure 3-4 for an example of AN_0 connections to external components. In this example, the AN_0
configuration results in Full-Duplex advertised.
Figure 3-4. AN Pin Configuration and LED Loading Example
12
Hardware Configuration
Copyright © 2012–2013, Texas Instruments Incorporated
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