RTL8201 datasheet(12/29 Pages) ETC

12 / 29 page

RTL8201BL

2002-03-29

Rev.1.2

6.9 Register 17 Loopback, Bypass, Receiver Error Mask

Address

Name

Description/Usage

Default/Attribute

17:<15>

RPTR

Set to 1 to put the RTL8201BL into repeater mode

0, RW

17:<14>

BP_4B5B

Assertion of this bit allows bypassing of the 4B/5B &

5B/4B encoder.

0, RW

17:<13>

BP_SCR

Assertion of this bit allows bypassing of the

scrambler/descrambler.

0, RW

17:<12>

LDPS

Set to 1 to enable Link Down Power Saving mode

0, RW

17:<11>

AnalogOFF

Set to 1 to power down analog function of transmitter

and receiver.

0, RW

17:<10>

DetectLength

Detect length OK indication. Assert low to indicate

detect length OK.

0, RO

17:<9:8>

LB<1:0>

LB<1:0> are register bits for loopback control as

defined below:

1) 0 0 for normal mode;

2) 0 1 for PHY loopback;

3) 1 0 for twister loopback

<0, 0>, RW

17:<7>

F_Link_100

Used to logic force good link in 100Mbps for

diagnostic purposes.

1, RW

17:<6:5>

Reserved

17:<4>

CODE_err

Assertion of this bit causes a code error detection to

be reported.

0, RW

17:<3>

PME_err

Assertion of this bit causes a pre-mature end error

detection to be reported.

0, RW

17:<2>

LINK_err

Assertion of this bit causes a link error detection to be

reported.

0, RW

17:<1>

PKT_err

Assertion of this bit causes a detection of packet

errors due to 722 ms time-out to be reported.

0, RW

17:<0>

RWPara

Parameter access enable, set 1 to access register

20~24

0, RW

6.10 Register 18 RX_ER Counter(REC)

Address

Name

Description/Usage

Default/Attribute

18:<15:0>

RXERCNT

This 16-bit counter increments by 1 for each valid

packet received.

H’[0000],

6.11 Register 19 10Mbps Network Interface Configuration Register

Address

Name

Description/Usage

Default/Attribute

19:<15:6>

Reserved

19:<5>

This bit is the active low TPI link disable signal.

When low TPIstilltransmit link pulses and TPI stays

in good link state.

1, RW

19:<4:2>

Reserved

19:<1>

HBEN

Heart beat enable

1, RW

19:<0>

JBEN

1 = enable jabber function

0 = disable jabber function

1, RW

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