DP83847 datasheet(42/60 Pages) NSC

42 / 60 page

www.national.com

Table 22. 10Base-T Status/Control Register (10BTSCR), Address 0x1A

Bit

Bit Name

Default

Description

15:9

Unused

0, RO

LOOPBACK_10_DIS

0, RW

10BASE-T Loopback Disable:

If bit 14 (Loopback) in the BMCR is 0:

1 = 10 Mb/s Loopback is disabled.

If bit 14 (Loopback) in the BMCR is 1:

1 = 10 Mb/s Loopback is enabled.

LP_DIS

0, RW

Normal Link Pulse Disable:

1 = Transmission of NLPs is disabled.

0 = Transmission of NLPs is enabled.

FORCE_LINK_10

0, RW

Force 10Mb Good Link:

1 = Forced Good 10Mb Link.

0 = Normal Link Status.

RESERVED

0, RW

RESERVED:

Must be zero.

4POLARITY

RO/LH

10Mb Polarity Status:

This bit is a duplication of bit 12 in the PHYSTS register. Both bits

will be cleared upon a read of 10BTSCR register, but not upon a

read of the PHYSIS register.

1 = Inverted Polarity detected.

0 = Correct Polarity detected.

RESERVED

0, RW

RESERVED:

Must be zero.

RESERVED

1, RW

RESERVED:

Must be set to one.

HEARTBEAT_DIS

0, RW

Heartbeat Disable: This bit only has influence in half-duplex 10Mb

mode.

1 = Heartbeat function disabled.

0 = Heartbeat function enabled.

When the device is operating at 100Mb or configured for full

duplex operation, this bit will be ignored - the heartbeat func-

tion is disabled.

JABBER_DIS

0, RW

Jabber Disable:

Applicable only in 10BASE-T.

1 = Jabber function disabled.

0 = Jabber function enabled.

DP83847 Datasheet(PDF) 42 Page - National Semiconductor (TI)

DP83847 Datasheet(HTML) 42 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Datasheet Download

Link URL