82545GM Просмотр технического описания (PDF) - Intel

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производитель

82545GM

Gigabit Ethernet Controller

Intel 

82545GM — Networking Silicon

3.7

Serializer / Deserializer (SERDES) Signals

3.8

Symbol

RX +/-

TX +/-

SIG_

DETECT

Type

Name and Function

SERDES Receive Pair. These two signals comprise the differential receive pair for the

I

1.25 GHz serial interface. If the SERDES interface is not used, these signals should not

be connected.

SERDES Transmit Pair. These two signals comprise the differential transmit pair for

O

the 1.25 GHz serial interface. If the SERDES interface is not used, these signals should

not be connected.

Signal Detect. This pin indicates when a SERDES signal (connected to the 1.25 GHz

I

serial interface) has been detected by the optical transceiver. If the SERDES interface

is not used, this signal should be connected to ground through a pull-down resistor.

JTAG Test Interface Signals

3.9

3.9.1

Symbol Type

Name and Function

JTAG_TCK I

JTAG_TDI I

JTAG_TDO O

JTAG_TMS I

JTAG_

TRST#

I

CLK_VIEW O

TEST#

I

JTAG Clock.

JTAG TDI.

JTAG TDO.

JTAG TMS.

JTAG Reset. This is an active low reset signal for JTAG. This signal should be

terminated using a pull-down resistor to ground. It must not be left unconnected.

Clock View. The Clock View signal is an output for the clock signals required for IEEE

testing. The clock is selected by register programming. For IEEE testing, a 2-pin header

should be connected to CLK_VIEW with one signal connected to GND, and the other,

to CLK_VIEW.

Factory Test Pin. This is an active low input and has an internal pull-up resistor. For

normal operation, TEST# should be left unconnected.

Power Supply Connections

Power Support Signals

Symbol

CTRL_15

CTRL_25

Type

Name and Function

A

1.5 V Control. The 1.5 V Control signal is an output to an external power transistor. If

regulators are used, it should be left unconnected.

A

2.5 V Control. The 2.5 V Control signal is an output to an external power transistor. If

regulators are used, it should be left unconnected.

16

Datasheet

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