NSK70721PE.C2 Intel, NSK70721PE.C2 Datasheet - Page 32

• Manufacturer Part Number: NSK70721PE.C2
• Manufacturer: Intel

Specifications of NSK70721PE.C2

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Supplier Unconfirmed

SK70725/SK70721 — Enhanced Multi-Rate DSL Data Pump Chip Set
3.1.6.9
32
7
0
0
0
0
0
0
0
0
0
0
0 0 0 1 1 1 0 0
1. Accuracy of noise margin is ±1 dB.
2. Reduce indicated noise margin by 6 dB if receiver gain (Register WR9) is increased by 6 dB.
MSB
Table 16. AGC Tap Value Register (RD1)
Table 17. Noise Margin Register (RD2)
6
0
0
0
0
0
0
0
0
0
0
5
1
1
1
1
1
1
1
1
1
0
4
1
0
0
0
0
0
0
0
0
1
3
0
1
1
1
0
0
0
0
0
1
RD2—Noise Margin Register
RD2 provides a calculated, logarithmic noise margin value which is used by the EMDP state
machine. This coded noise margin value is according to ETSI ETR 152 recommendation. The
noise margin value is always available, but it is recalculated and updated only every 64 baud.
17
The indicated noise margin is affected by the setting of the Gain Control Register (WR9). If the
receiver gain is increased by 6 dB, the indicated noise margin must be decreased by 6 dB.
B7:B0
shows the noise margin coding.
2
1
1
0
0
1
1
1
0
0
1
Bit
LSB
1
0
1
1
0
1
0
0
1
0
1
Address: A<3:0> = 0010
Default: xxh (x=undefined)
Attributes: Read Only.
0
1
1
1
1
1
1
0
0
0
0
FFE AGC Tap Value (eight most significant bits).
B7 - AGC Tap Sign bit - always = 0
B6 - AGC Tap MSB, Value: 1
B5 - Value: 0.5 (1/2)
B4 - Value: 0.25 (1/4)
B3 -Value: 0.125 (1/8)
B2 -Value: 0.0625 (1/16)
B1 - Value: 0.03125 (1/32)
B0 - AGC Tap LSB, Value: 0.015625 (1/64)
Coded Noise Margin
+14.0
+26.5
+23.5
+21.5
+20.5
+19.5
+18.5
+18.0
+17.0
+16.0
+15.0
Description
1,2
7
0
0
0
0
0
0
0
0
0
1
1 1 1 1 1 1 0 0
MSB
6
0
0
0
0
0
0
0
0
0
1
5
0
0
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
0
0
1
3
0
1
1
1
1
0
0
0
0
1
2
0
1
1
0
0
1
1
0
0
1
LSB
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
Coded Noise Margin
+8.0
+7.0
+6.0
+5.0
+4.0
+3.0
+2.0
+1.0
-2.0
-1.0
0.0
Datasheet
Table
1,2