XC886/888CLM
CORDIC Coprocessor
User’s Manual
11-10
V1.3, 2010-02
CORDIC Coprocessor, V 1.2.1
Table 11-3
Normalized Deviation of a Calculation
Mode
X Normalized Deviation
Y or Z Normalized Deviation
Circular
Vectoring
Input conditions: Useful Domain and [(1.64676/2)·sqrt(X
2
+Y
2
)
≥
600]
0 : 50.8317%
1 : 49.1683%
ND for X
≤
1
0 : 55.8702%
1 : 44.1298%
ND for Z
≤
1
Circular
Rotation
Input conditions: Useful Domain (Full range of X, Y and Z)
0 : 50.7715%
1 : 48.8579%
2 : 0.3681%
3 : 0.0023%
4 : 0.0002%
ND for X
≤
4
0 : 51.2011%
1 : 48.4944%
2 : 0.3024%
3 : 0.0020%
4 : 0.0001%
ND for Y
≤
4
Linear
Vectoring
Input conditions: Useful Domain (|Y / X|
≤
2, X > 0)
0 : 66.9170%
1 : 33.0830%
ND for X
≤
1
0 : 88.5676%
1 : 11.4322%
2 : 0.0002%
ND for Z
≤
2
Linear
Rotation
Input conditions: Useful Domain (|Z|
≤
2)
0 : 69.7141%
1 : 30.2859%
ND for X
≤
1
0 : 62.4055%
1 : 37.1965%
2 : 0.3980%
ND for Y
≤
2
Hyperbolic
Vectoring
Input conditions: Useful Domain (|Y| < |X|, X > 0, |atanh(Y / X)|
≤
1.11rad)
0 : 34.5399%
1 : 34.5438%
2 : 17.9254%
3 : 11.6747%
4 : 1.3162%
ND for X
≤
4
0 : 58.3062%
1 : 41.6938%
ND for Z
≤
1
*