CS8952 datasheet(55/82 Pages) CIRRUS

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CS8952

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

Rx Disable

Read/Write 0

When set, the receiver is disabled and no incoming

packets pass through the receiver. The link will

remain established and, if operating at 100 Mb/s, the

descrambler will remain locked. When clear, the

receiver is enabled.

If Rx Disable is set while a packet is being received,

reception is completed and no subsequent receive

packets are allowed until Rx Disable is cleared again.

Also, if Rx Disable is cleared while a packet is being

received, the receiver will remain disabled until the

end of the incoming packet. This prevents fragments

from being sent to the MAC.

Note: This bit is disabled, and writes to this bit are

ignored when the National Compatibility Mode bit of

the 10BASE-T Configuration Register (address 1Ch)

is set.

LED1 Mode

Read/Write 0

This bit defines the mode of Pin LED1. When this bit

is set, pin LED1 indicates Carrier Integrity Monitor

status as determined by the CIM Status bit in the Self

Status Register (address 19h). When this bit is clear,

LED1 indicates 10 Mb/s or 100 Mb/s transmission

activity.

LED4 Mode

Read/Write 0

This bit defines the mode of Pin LED4. When this bit

is set, pin LED4 indicates full duplex mode for

10 Mb/s or 100 Mb/s. When this bit is clear, LED4

indicates Polarity in 10 Mb/s mode or full-duplex in

100 Mb/s mode.

Digital Reset

Read/Write 0

When set, this bit will reset all digital logic and regis-

ters to their initial values. The analog circuitry will not

be affected.

Note: This bit is disabled, and writes to this bit are

ignored when the National Compatibility Mode bit of

the 10BASE-T Configuration Register (address 1Ch)

is set.

BIT

NAME

TYPE

RESET

DESCRIPTION

CS8952 Datasheet(PDF) 55 Page - Cirrus Logic

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