STM32L4x2 1.6 CM4 r1p0 little false false 3 false DAC1 DAC 0x40007400 0x0 0x400 registers CR CR control register 0x0 0x20 read-write 0x00000000 EN1 DAC channel1 enable 0 1 DAC3 Digital-to-analog converter DAC 0x40007400 0x0 0x400 registers CR3 CR3 control register 3 0x3 0x23 read-write 0x00000003 EN3 DAC channel3 enable 3 3