Datasheet

TLK105
TLK106
www.ti.com SLLSEB8A –AUGUST 2012–REVISED MARCH 2013
Table 8-36. Cable Diagnostic Specific Control Register (CDSCR), address 0x0170 (continued)
BIT BIT NAME DEFAULT DESCRIPTION
14 Diagnostic Cross 0,RW Cross TDR Diagnostic mode
Disable 1 = Disable TDR Cross mode – TDR will be executed in regular mode only
0 = Diagnostic of crossing pairs is enabled In Cross Diagnostic mode, the TDR mechanism
is looking for reflection on the other pair to check short between pairs.
13 Diagnostic TPTD 0,RW TPTD Diagnostic Bypass
Bypass 1 = Bypass TPTD diagnostic. TDR on TPTD pair will not be executed.
0 = TDR is executed on TPTD pair
In bypass TPTD, results are available in TPRD slots.
12 Diagnostic TPRD 0,RO TPRD Diagnostic Bypass
Bypass 1 = Bypass TPRD diagnostic. TDR on TPRD pair will not be executed.
0 = TDR is executed on TPRD pair
11 RESERVED 1,RW RESERVED: Must be Set to 1.
10:8 Diagnostics Average <110>,RW Number Of TDR Cycles to Average:
Cycles <000>: 1 TDR cycle
<001>: 2 TDR cycles
<010>: 4 TDR cycles
<011>: 8 TDR cycles
<100>: 16 TDR cycles
<101>: 32 TDR cycles
<110>: 64 TDR cycles (default)
<111>: Reserved
7:0 RESERVED 0,RO RESERVED: Writes ignored, read as 0.
Table 8-37. Cable Diagnostic Specific Control Register 2 (CDSCR2), address 0x0171
BIT BIT NAME DEFAULT DESCRIPTION
15:4 RESERVED <1100 1000 RESERVED: Ignore on read
0101>, RW
3:0 TDR pulse control <0001>, Configure expected self reflection in TDR
RW
Table 8-38. Cable Diagnostic Specific Control Register 3 (CDSCR3), address 0x0173
BIT BIT NAME DEFAULT DESCRIPTION
15:8 Cable length cfg <1010 Configure duration of listening to detect long cable reflections
0000>, RW
7:0 RESERVED <0001 RESERVED: Ignore on read
1110>, RW
Table 8-39. Cable Diagnostic Specific Control Register 4 (CDSCR4), address 0x0177
BIT BIT NAME DEFAULT DESCRIPTION
15:13 RESERVED <000>, RW RESERVED: Ignore on read
12:8 Short cables TH <0 1101>, TH to compensate for strong reflections in short cables
RW
7:0 RESERVED <1001 RESERVED: Ignore on read
0110>, RW
8.20.3 Cable Diagnostic Location Results Register 1 (CDLRR1)
This register provides the peaks locations after execution of the TDR. The values of this register are valid
after reading 1 in Diagnostic Done bit 1 in register CDCR (0x1E).
Table 8-40. Cable Diagnostic Location Results Register 1 (CDLRR1), address 0x0180
BIT NAME DEFAULT FUNCTION
15:8 TPTD Peak <0000 0000>, RO Location of the Second peak discovered by the TDR mechanism on Transmit Channel
Location 2 (TPTD). The value of these bits is translated into distance from the PHY
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