I347-AT4 Datasheet, PDF (103/148 Pages) Intel Corporation – Intel® Ethernet Network Connection I347-AT4 Datasheet

Programmer’s Visible State—I347-AT4
Bits
Field
Mode
HW Rst SW Rst
Description
0000000 = No reflection (0 mV)
each bit above increases 7.8125mV.
When 23_5.7 = 0 and 23_5.13:11 = 000 or 111 the reflected
amplitude between the thresholds specified in registers
26_5, 27_5, 28_5.6:0, 26_7, 27_7, and 28_7.6:0 are
reported as 0 mV.
14:8
Reflected
Amplitude
RO
xx
Retain
When 23_5.7 = 0 and 23_5.13:11 is not 000 or 111 the
reflected amplitude between the thresholds specified in
register 25_5 and 25_7 are reported as 0 mV.
When 23_5.7 = 1 the actual offset or reflected amplitude is
reported and the threshold specified in registers 25_5, 26_5,
27_5, 28_5, 25_7, 26_7, 27_7, and 28_7 are ignored.
7:0
Distance
The amplitude value is valid only When 23_5.14 = 1.
If bit 15:8 = 0x00 indicates that the test failed.
Distance of reflection.
RO
xx
Retain
The distance value is valid only when 23_5.7 = 0 and
23_5.14 = 1.
Note:
This register reports the reflection seen based on the setting of register 23_5.13:11
000 = MDI[3] Tx to MDI[3] Rx
100 = MDI[0] Tx to MDI[3] Rx
101 = MDI[1] Tx to MDI[3] Rx
110 = MDI[2] Tx to MDI[3] Rx
111 = MDI[3] Tx to MDI[3] Rx
4.1.42 1000BASE-T Pair Skew Register - Page 5, Register 20
Bits
Field
15:12
Pair 7,8
(MDI[3]±)
11:8
7:4
3:0
Pair 4,5
(MDI[2]±)
Pair 3,6
(MDI[1]±)
Pair 1,2
(MDI[0]±)
Mode
RO
RO
HW Rst SW Rst
Description
Skew = bit value x 8ns. Value is correct to within ± 8ns.
0x0
0x0
The contents of 20_5.15:0 are valid only if Register 21_5.6 =
1
0x0
0x0
Skew = bit value x 8ns. Value is correct to within ± 8ns.
RO
0x0
0x0
Skew = bit value x 8ns. Value is correct to within ± 8ns.
RO
0x0
0x0
Skew = bit value x 8ns. Value is correct to within ± 8ns.
4.1.43 1000BASE-T Pair Swap and Polarity - Page 5, Register 21
Bits
15:7
Field
Reserved
6
Register 20_5
and 21_5 valid
Mode
RO
RO
HW Rst SW Rst
Description
0x000
0x0
0x000
0x0
Reserved for future use.
The contents of 21_5.5:0 and 20_5.15:0 are valid only if
Register 21_5.6 = 1
1= Valid .
0 = Invalid
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