control register
| EN1 | DAC channel1 enable |
| BOFF1 | DAC channel1 output buffer disable |
| TEN1 | DAC channel1 trigger enable |
| TSEL1 | DAC channel1 trigger selection |
| WAVE1 | DAC channel1 noise/triangle wave generation enable |
| MAMP1 | DAC channel1 mask/amplitude selector |
| DMAEN1 | DAC channel1 DMA enable |
| DMAUDRIE1 | DAC channel1 DMA Underrun Interrupt enable |
| EN2 | DAC channel2 enable |
| BOFF2 | DAC channel2 output buffer disable |
| TEN2 | DAC channel2 trigger enable |
| TSEL2 | DAC channel2 trigger selection |
| WAVE2 | DAC channel2 noise/triangle wave generation enable |
| MAMP2 | DAC channel2 mask/amplitude selector |
| DMAEN2 | DAC channel2 DMA enable |
| DMAUDRIE2 | DAC channel2 DMA underrun interrupt enable |