CS8952 datasheet(46/82 Pages) CIRRUS

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CS8952

CrystalLAN™ 100BASE-X and 10BASE-T Transceiver

Remote Loopback

Fault

Read Only

When set, this bit indicates that the Elastic Buffer has

detected an over-run or an under-run condition. In

any case, the frame generating this fault will be ter-

minated.

This should never happen since the depth of the

elastic buffer (10 bits) is greater than twice the maxi-

mum number of bit times the receive and transmit

clocks may slip during a maximum length packet

assuming clock frequency tolerances of 100 ppm or

less.

Reset Complete

Read Only

When set, this bit indicates that the internal analog

calibration cycle has completed, and all analog and

digital circuitry is ready for normal operation.

Jabber Detect

Read Only

In 10BASE-T mode, if the last transmission is longer

than 105 ms, then the packet output is terminated by

the jabber logic and this bit is set.

This bit is implemented with a latching function so

that the occurrence of a jabber condition causes it to

become set until it is cleared by a read to this regis-

ter, a read to the Basic Mode Status Register

(address 01h), or a reset.

No jabber detect function has been defined for

100BASE-TX.

This bit is the same as in the Basic Mode Status Reg-

ister (address 01h).

Auto-Neg Complete Read Only

This bit is set when the auto-negotiation process has

completed. This is an indication that the Auto-Negoti-

ation Advertisement Register (address 04h), the

Auto-Negotiation Link Partner Ability Register

(address 05h), and the Auto-Negotiation Expansion

This bit is the same as in the Basic Mode Status Reg-

ister (address 01h).

Parallel Detection

Fault

Read Only

When set, this bit indicates an error condition in

which auto-negotiation has detected that unstable

10BASE-T or 100BASE-TX link signalling was

received. This bit is self-clearing.

This bit is the same as in the Auto-Negotiation

Expansion Register (address 06h)

Parallel Fail

Read Only

When set, this bit indicates that a parallel detection

has occurred for a technology that is not currently

advertised by the local device.

BIT

NAME

TYPE

RESET

DESCRIPTION

CS8952 数据表(PDF) 46 Page - Cirrus Logic

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