SNLS059E datasheet(76/110 Pages) TI2

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4.0 Register Set (Continued)

4.3.12 False Carrier Sense Counter Register

This counter provides information required to implement the “FalseCarriers” attribute within the MAU managed object

class of Clause 30 of the IEEE 802.3u specification.

4.3.13 Receiver Error Counter Register

This counter provides information required to implement the “SymbolErrorDuringCarrier” attribute within the PHY

managed object class of Clause 30 of the IEEE 802.3u specification.

4.3.14 100 Mb/s PCS Configuration and Status Register

Tag: FCSCR

Size: 16 bits

Hard Reset: 0000h

Offset: 00D0h

Access: Read Write

Bit

Bit Name

Description

15:8

Reserved

Reserved: Writes ignored, Read as 0

7:0

FCSCNT[7:0] False Carrier Event Counter: Default: 0, RW/COR

This 8-bit counter increments on every false carrier event. This counter sticks when it reaches its max

count (FFh).

Tag: RECR

Size: 16 bits

Hard Reset: 0000h

Offset: 00D4h

Access: Read Write

Bit

Bit Name

Description

15:8

Reserved

Reserved: Writes ignored, Read as 0

7:0

RXERCNT[7:0] RXER Counter: Default: 0, RW / COR

This 8-bit counter increments for each receive error detected. when a valid carrier is present and there

is at least one occurrence of an invalid data symbol. This event can increment only once per valid

carrier event. If a collision is present, the attribute will not increment. The counter sticks when it

reaches its max count.

Tag: PCSR

Size: 16 bits

Hard Reset: 0100h

Offset: 00D8h

Access: Read Write

Bit

Bit Name

Description

15:13

Reserved

Reserved: Writes ignored, Read as 0

BYP_4B5B

Bypass 4B/5B Encoding:

1 = 4B5B encoder functions bypassed

0 = Normal 4B5B operation

FREE_CLK

Receive Clock:

1 = RX_CK is free-running

0 = RX_CK phase adjusted based on alignment

TQ_EN

100 Mb/s True Quiet Mode Enable:

1 = Transmit True Quiet Mode

0 = Normal Transmit Mode

SD_FORCE_B

Signal Detect Force:

1 = Forces Signal Detection

0 = Normal SD operation

SNLS059E Datasheet(PDF) 76 Page - Texas Instruments

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