SPRUJ55D September 2023 – July 2025 AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1
The data filter output can be represented in either 32-bit or 16-bit format.
32-bit data filter representation:
16-bit data filter representation:
For example, for the data filter configuration below:
The data filter with a 26-bit signed output value can be in the range of –16,777,216 to 16,777,216. But, 16-bit signed output supports values only from –32,768 to 32,767. Therefore, it is required to configure shift control bits (SDDPARMx.SH) to 7 to represent the data filter output correctly in 16-bit format. Table 7-192 shows the configuration settings of shift control bits for different OSR and filter types.
| OSR | Sinc1 | Sinc2 | SincFast | Sinc3 |
|---|---|---|---|---|
| 1 to 31 | 0 | 0 | 0 | 0 |
| 32 to 40 | 0 | 0 | 0 | 1 |
| 41 to 50 | 0 | 0 | 0 | 2 |
| 51 to 63 | 0 | 0 | 0 | 3 |
| 64 to 80 | 0 | 0 | 0 | 4 |
| 81 to 101 | 0 | 0 | 0 | 5 |
| 102 to 127 | 0 | 0 | 0 | 6 |
| 128 to 161 | 0 | 0 | 1 | 7 |
| 162 to 181 | 0 | 0 | 1 | 8 |
| 182 to 203 | 0 | 1 | 2 | 8 |
| 204 to 255 | 0 | 1 | 2 | 9 |
| 256 | 0 | 2 | 3 | 10 |