TLK111 datasheet(6/110 Pages) TI1

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TLK111

SLLSEF8B – AUGUST 2013 – REVISED JANUARY 2014

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2.4

10Mbs and 100Mbs PMD Interface

TYPE

DESCRIPTION

NAME

NO.

Differential common driver transmit output (PMD Output Pair): These differential outputs are

automatically configured to either 10Base-T or 100Base-TX signaling.

TD–, TD+

16, 17

I/O

In Auto-MDIX mode of operation, this pair can be used as the Receive Input pair. These pins require 3.3V

bias for operation.

Differential receive input (PMD Input Pair): These differential inputs are automatically configured to

accept either 100Base-TX or 10Base-T signaling.

RD–, RD+

13, 14

I/O

In Auto-MDIX mode of operation, this pair can be used as the Transmit Output pair. These pins require

3.3V bias for operation.

2.5

Clock Interface

TYPE

DESCRIPTION

NAME

NO.

CRYSTAL/OSCILLATOR INPUT:

MII reference clock: Reference clock. 25MHz ±50ppm-tolerance crystal reference or oscillator input. The

device supports either an external crystal resonator connected across pins XI and XO, or an external

CMOS-level oscillator source connected to pin XI only.

RMII reference clock: Primary clock reference input for the RMII mode. The input must be connected to a

50MHz ±50ppm-tolerance CMOS-level oscillator source.

CRYSTAL OUTPUT: Reference Clock output. XO pin is used for crystal only. This pin should be left floating

when an oscillator input is connected to XI.

CLOCK OUTPUT: In MII mode, this pin provides a 25 MHz clock output to the system. In RMII mode, this

CLKOUT

pin provides a 50MHz clock output. This feature allows other devices to use the reference clock from the

TLK111 without requiring additional clock sources.

2.6

LED Interface

(See Table 3-3 for LED Mode Selection)

TYPE

DESCRIPTION

NAME

NO.

LED Pin to indicate status

Mode 1

LINK Indication LED: Indicates the status of the link. When the link is good, the LED

LED_LINK /

is ON.

S, O, PU

AN_0

Mode 2 and

ACT indication LED: Indicates transmit and receive activity in addition to the status

Mode 3

of the Link. The LED is ON when Link is good. The LED blinks when the transmitter

or receiver is active.

LED_SPEED /

LED Pin to indicate the speed of the link. SPEED Indication LED indicates whether the link is

S, O, PU

SD_IN / AN_1

100Mb/s or 10Mb/s. The LED is ON when the link speed is 100Mbs and OFF when it is 10Mbs.

LED Pin to indicate status.

Mode 1

ACT indication LED: Indicates if there is any activity on the link. The LED is ON

LED_ACT /

(pulse) when activity is present on either Transmit or Receive channel.

S, O, PU

AN_EN

Mode 2

COL indication LED: Indicates collision detection.

Mode 3

may be programmed to DUPLEX Indication LED and indicates Full-duplex status.

2.7

JTAG Interface

TYPE

DESCRIPTION

NAME

NO.

JTAG_TCK

I, PU

JTAG Test Clock: This pin has a weak internal pullup.

JTAG_TDI

I, PU

JTAG Test Data Input: This pin has a weak internal pullup.

JTAG_TDO

JTAG Test Data Output

Pin Descriptions

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