Datasheet

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4.0 Register Set (Continued)
DP83815
4.3.16 10BASE-T Status/Control Register
Tag: TBTSCR Size: 16 bits Hard Reset: 0004h
Offset: 00E8h Access: Read Write
Bit Bit Name Description
15:9 Unused
8 LOOPBACK_10_DIS 10BASE-T Loopback Disable:
This bit is OR’ed with bit 14 (Loopback) in the BMCR.
1 = 10 Mb/s Loopback is enabled
0 = 10 Mb/s Loopback is disabled
7 LP_DIS Normal Link Pulse Disable:
This bit is OR’ed with the MAC_FORCE_LINK_10 signal.
1 = Transmission of NLPs is disabled
0 = Transmission of NLPs is enabled
6 FORCE_LINK_10 Force 10 Mb/s Good Link:
This bit is OR’ed with the MAC_FORCE_LINK_10 signal.
1 = Forced Good 10 Mb/s Link
0 = Normal Link Status
5 FORCE_POL_COR Force 10 Mb/s Polarity Correction:
1 = Force inverted polarity
0 = Normal polarity
4 POLARITY 10 Mb/s Polarity Status: RO/LH
This bit is a duplication of bit 12 in the PHYSTS register. Both bits will be cleared upon a read of
either register.
1 = Inverted Polarity detected
0 = Correct Polarity detected
3 AUTOPOL_DIS Auto Polarity Detection & Correction Disable:
1 = Polarity Sense & Correction disabled
0 = Polarity Sense & Correction enabled
2 Reserved Reserved
This bit must be written as a one.
1 HEARTBEAT_DIS Heartbeat Disable: This bit only has influence in half-duplex 10 Mb/s mode.
1 = Heartbeat function disabled
0 = Heartbeat function enabled
When the device is operating at 100 Mb/s or configured for full duplex, this bit will be ignored - the
heartbeat function is disabled.
0 JABBER_DIS Jabber Disable:
Applicable only in 10BASE-T Full Duplex.
1 = Jabber function disabled
0 = Jabber function enabled
Obsolete