SLLSEC6E September 2012 – June 2019 DP83848-EP
PRODUCTION DATA.
BIT | BIT NAME | DEFAULT | DESCRIPTION |
---|---|---|---|
15 | 10BT_SERIAL | Strap, RW | 10Base-T Serial Mode (SNI): |
1 = Enables 10Base-T Serial Mode | |||
0 = Normal Operation | |||
Places 10 Mbps transmit and receive functions in Serial Network Interface (SNI) Mode of operation. Has no effect on 100 Mbps operation. | |||
14:12 | RESERVED | 0, RW | RESERVED: Must be zero |
11:9 | SQUELCH | 100, RW | Squelch Configuration: |
Used to set the Squelch ‘ON’ threshold for the receiver | |||
Default Squelch ON is 330mV peak | |||
8 | LOOPBACK_10_D IS | 0, RW | In half-duplex mode, default 10BASE-T operation loops Transmit data to the Receive data in addition to transmitting the data on the physical medium. This is for consistency with earlier 10BASE2 and 10BASE5 implementations which used a shared medium. Setting this bit disables the loopback function. |
This bit does not affect loopback due to setting BMCR[14]. | |||
7 | LP_DIS | 0, RW | Normal Link Pulse Disable: |
1 = Transmission of NLPs is disabled | |||
0 = Transmission of NLPs is enabled | |||
6 | FORCE_LINK_10 | 0, RW | Force 10Mb Good Link: |
1 = Forced Good 10Mb Link | |||
0 = Normal Link Status | |||
5 | RESERVED | 0, RW | RESERVED: Must be zero |
4 | POLARITY | 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 PHYSTS register. | |||
1 = Inverted Polarity detected | |||
0 = Correct Polarity detected | |||
3 | RESERVED | 0, RW | RESERVED: Must be zero |
2 | RESERVED | 1, RW | RESERVED: Must be zero |
1 | 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 function is disabled. | |||
0 | JABBER_DIS | 0, RW | Jabber Disable: |
Applicable only in 10BASE-T. | |||
1 = Jabber function disabled | |||
0 = Jabber function enabled |