dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 66

• Manufacturer Part Number: dp83630sqx
• Description: Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
• Manufacturer: National Semiconductor Corporation

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14:12
11:9
Bit
15
14.2.7 10Base-T Status/Control Register (10BTSCR)
This register is used for control and status for 10BASE-T device operation.
8
7
6
5
4
3
2
1
0
LOOPBACK_10_DIS
10BT_SCALE - MSB
FORCE_POL COR
HEARTBEAT_DIS
FORCE_LINK_10
AUTOPOL_DIS
JABBER_DIS
RESERVED
RESERVED
SQUELCH
POLARITY
Bit Name
LP_DIS
TABLE 33. 10Base-T Status/Control Register (10BTSCR), address 0x1A
0, RO/LH
000, RW
100, RW
Default
0, RW
0, RW
0, RW
0, RW
0, RW
1, RW
0, RW
0, RW
0, RO
RESERVED: Writes ignored, read as 0.
RESERVED: Must be zero.
Squelch Configuration:
Used to set the Squelch 'ON' threshold for the receiver.
Default Squelch 'ON' is 330mV peak.
10Base-T Loopback Disable:
This bit is OR’ed with bit 14 (Loopback) in the BMCR.
1 = 10BT Loopback is disabled
0 = 10BT Loopback is enabled
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.
Force 10 Mb Good Link:
This bit is OR’ed with the MAC_FORCE_LINK_10 signal.
1 = Forced Good 10 Mb Link.
0 = Normal Link Status.
Force 10 Mb Polarity Correction:
1 = Force inverted polarity
0 = Normal polarity
10 Mb Polarity Status:
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.
Auto Polarity Detection & Correction Disable:
1 = Polarity Correction disabled
0 = Polarity Correction enabled
10BT Scale Configuration Most Significant Bit
Used in conjunction with bit 10 of SD_CNFG register to set the silence ’OFF’
threshold for the receiver.
Heartbeat Disable:
This bit only has influence in half-duplex 10 Mb mode.
1 = Heartbeat function disabled.
0 = Heartbeat function enabled.
When the device is operating at 100 Mb or configured for full duplex
operation, this bit will be ignored - the heartbeat function is disabled.
Jabber Disable:
This bit is only applicable in 10BASE-T.
1 = Jabber function disabled.
0 = Jabber function enabled.
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Description