INRO_SEL=8KHZ
Control Trim System Initialization Register.
| VDDA_LIMITLO | VDDA Low Trim Limit. |
| VDDA_LIMITHI | VDDA High Trim Limit. |
| IPO_LIMITHI | IPO High Trim Limit. |
| INRO_SEL | INRO Clock Select. 0 (8KHZ): undefined 1 (16KHZ): undefined 2 (30KHZ): undefined |
| INRO_TRIM | INRO Clock Trim. |