register description
| I2C_RESET_POR_FORCE_PD | Need add desc |
| I2C_RESET_POR_FORCE_PU | Need add desc |
| SAR_I2C_PU | PLLA force power up |
| PLLA_FORCE_PD | PLLA force power down |
| PLLA_FORCE_PU | PLLA force power up |
| BBPLL_CAL_SLP_START | start BBPLL calibration during sleep |
| TXRF_I2C_PU | 1: TXRF_I2C power up |
| RFRX_PBUS_PU | 1: RFRX_PBUS power up |
| CKGEN_I2C_PU | 1: CKGEN_I2C power up |
| PLL_I2C_PU | Need add desc |