SD/MMC sample and drive delay register
| SAMPLE_DELAY | SD/MMC sample delay. The delay value is SAMPLE_DELAY x 0.5 ns. |
| RESERVED | Reserved. Do not write ones to reserved register bits. |
| DRV_DELAY | SD/MMC drive delay. The delay value is DRV_DELAY x 0.5 ns. The values DRV_DELAY = 0 and DRV_DELAY = 1 are not allowed. |
| RESERVED | Reserved. Do not write ones to reserved register bits. |