RM0440 Rev 4 483/2126
RM0440 CORDIC co-processor (CORDIC)
485
17.4.2 CORDIC argument register (CORDIC_WDATA)
Address offset: 0x04
Reset value: 0xXXXX XXXX
Bits 10:8 SCALE[2:0]: Scaling factor
The value of this field indicates the scaling factor applied to the arguments and/or results. A
value n implies that the arguments have been multiplied by a factor 2
-n
, and/or the results
need to be multiplied by 2
n
. Refer to Section 17.3.2 for the applicability of the scaling factor
for each function and the appropriate range.
Bits 7:4 PRECISION[3:0]: Precision required (number of iterations)
0: reserved
1 to 15: (Number of iterations)/4
To determine the number of iterations needed for a given accuracy refer to Table 115.
Note that for most functions, the recommended range for this field is 3 to 6.
Bits 3:0 FUNC[3:0]: Function
0: Cosine
1: Sine
2: Phase
3: Modulus
4: Arctangent
5: Hyperbolic cosine
6: Hyperbolic sine
7: Arctanh
8: Natural logarithm
9: Square Root
10 to 15: reserved
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
ARG[31:16]
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1514131211109 8 765432 1 0
ARG[15:0]
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