dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 74

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

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15:9
Bit
7:0
15:8
15:14
8
Bit
7:0
14.4.4 TDR Window Register (TDR_WIN), Page 2
This register contains sample window control for the Time Domain Reflectometry (TDR) cable diagnostics. The two values con-
tained in this register specify the beginning and end times for the window to monitor the response to the transmitted pulse. Time
values are in 8 ns increments. This provides a method to search for multiple responses and also to screen out the initial outgoing
pulse.
14.4.5 TDR Peak Register (TDR_PEAK), Page 2
This register contains the results of the TDR Peak Detection. Results are valid if the TDR_CTRL[11] is clear following sending the
TDR pulse.
13:8
14.4.6 TDR Threshold Register (TDR_THR), Page 2
This register contains the results of the TDR Threshold Detection. Results are valid if the TDR_CTRL[11] is clear following sending
the TDR pulse.
Bit
7:0
TDR_THR_TIME
TDR_THR_MET
TDR_PEAK_TIME
RESERVED
Bit Name
TDR_START
TDR_STOP
RESERVED
TDR_PEAK
Bit Name
Bit Name
TABLE 44. TDR Threshold Register (TDR_THR), address 0x19
TABLE 42. TDR Window Register (TDR_WIN), address 0x17
TABLE 43. TDR Peak Register (TDR_PEAK), address 0x18
0000 0000, RO
0000 000, RO
0000 0000, RO
0000 0000, RW
0000 0000, RW
Default
00 0000, RO
0, RO
Default
00, RO
Default
RESERVED: Writes ignored, read as 0.
TDR Threshold Met:
This bit indicates the TDR threshold was met during the sample window. A
value of 0 indicates the threshold was not met.
TDR Threshold Time:
Specifies the time for the first data that met the TDR threshold. This field is
only valid if the threshold was met.
RESERVED: Writes ignored, read as 0.
TDR Peak Value:
This register contains the peak value measured during the TDR sample
window. If Min Mode control (TDR_CTRL[7]) is 0, this contains the
maximum detected value. If Min Mode control is 1, this contains the
minimum detected value.
TDR Peak Time:
Specifies the time for the first occurrence of the peak value.
TDR Start Window:
Specifies start time for monitoring TDR response.
TDR Stop Window:
Specifies stop time for monitoring TDR response. The Stop Window
should be set to a value greater than or equal to the Start Window.
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Description
Description
Description