AM79C988 데이터 시트보기 (PDF) - Advanced Micro Devices

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AM79C988

Quad Integrated Ethernet Transceiver (QuIET™)

Advanced Micro Devices 

PRELIMINARY

CMOS/PAUI Mode Selection

This command sets the QuIET interface drivers (PDO,

PDI, PCI) to be driven at normal PAUI signal levels or

CMOS voltage levels. The default is PAUI levels. Refer

to the DC Characteristics table for voltage levels.

K

0

CMOS Levels

1

PAUI Levels

Reset Function

The QuIET device enters the reset state when the reset

pin (RST) is held LOW. All ports, status registers, and

command registers are put into their default state. When

powering up the device, the RST pin should be held

LOW for 150 microseconds (µs). At other times, the RST

pin should be held LOW for a minimum of 4 µs. The

default conditions are detailed below.

Command and Status Default Conditions

Command

Extended Distance

Link Test

Link Pulse Transmit

Correct Polarity

Loopback Test

Transceiver Mode Selection

CMOS/PAUI Mode

Default

Disabled

Enabled

Enabled

Disabled

Disabled

Normal

PAUI Mode

Status

Device

Link

Polarity

Jabber

Default

QuIET

Fail

Correct

No Error

Am79C988A

11

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