29.16.6 PMC PLL Spread Spectrum Register
All fields defined here are applied to the PLL defined by the last ID field written in the PMC_PLL_UPDT register.
| Name: | PMC_PLL_SSR |
| Offset: | 0x0014 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ENSPREAD | |||||||||
| Access | R/W | ||||||||
| Reset | 0 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| NSTEP[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| STEP[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| STEP[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bit 28 – ENSPREAD Spread Spectrum Enable
| Value | Description |
|---|---|
| 0 | The spread spectrum is not applied to the PLL. |
| 1 | The spread spectrum is applied to the PLL. |
Bits 23:16 – NSTEP[7:0] Spread Spectrum Number of Steps
Specifies how many times STEP is applied to the PLL ratio. The value of NSTEP must be equal to or greater than 1.
Bits 15:0 – STEP[15:0] Spread Spectrum Step Size
When the spread spectrum is active, this field defines the step size that will be applied the PMC_PLL_CTRL1.FRACR factor. The step is applied on the LSB of PMC_PLL_CTRL1.FRACR.