USB=no, SMPHR=no, ADC=no, SDIO=no, FPU=no
funcstat register.
| FPU | FPU Function. 0 (no): undefined 1 (yes): undefined |
| USB | USB Function. 0 (no): undefined 1 (yes): undefined |
| ADC | ADC Function. 0 (no): undefined 1 (yes): undefined |
| SDIO | SDIO Function. 0 (no): undefined 1 (yes): undefined |
| SMPHR | SMPHR function. 0 (no): undefined 1 (yes): undefined |