Digital-to-analog converter (DAC) RM0440
756/2126 RM0440 Rev 4
22.7.2 DAC software trigger register (DAC_SWTRGR)
Address offset: 0x04
Reset value: 0x0000 0000
Bits 5:2 TSEL1[3:0]: DAC channel1 trigger selection
These bits select the external event used to trigger DAC channel1
0000: SWTRIG1
0001: dac_ch1_trig1
0010: dac_ch1_trig2
...
1111: dac_ch1_trig15
Refer to the trigger selection tables in Section 22.4.2: DAC pins and internal signals for
details on trigger configuration and mapping.
Note: Only used if bit TEN1 = 1 (DAC channel1 trigger enabled).
Bit 1 TEN1: DAC channel1 trigger enable
This bit is set and cleared by software to enable/disable DAC channel1 trigger.
0: DAC channel1 trigger disabled and data written into the DAC_DHR1 register are
transferred one dac_hclk clock cycle later to the DAC_DOR1 register
1: DAC channel1 trigger enabled and data from the DAC_DHR1 register are transferred
three dac_hclk clock cycles later to the DAC_DOR1 register
Note: When software trigger is selected, the transfer from the DAC_DHR1 register to the
DAC_DOR1 register takes only one dac_hclk clock cycle.
Bit 0 EN1: DAC channel1 enable
This bit is set and cleared by software to enable/disable DAC channel1.
0: DAC channel1 disabled
1: DAC channel1 enabled
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
SWTRIG
B2
SWTRIG
B1
ww
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. SWTRIG2 SWTRIG1
ww
Bits 31:18 Reserved, must be kept at reset value.
Bit 17 SWTRIGB2: DAC channel2 software trigger B
This bit is set by software to trigger the DAC in software trigger mode (sawtooth generation)
It is cleared by hardware.
0: No trigger
1: Trigger for sawtooth increment
Note: This bit is available only on dual-channel DACs. Refer to Section 22.3: DAC
implementation.
Bit 16 SWTRIGB1: DAC channel1 software trigger B
This bit is set by software to trigger the DAC in software trigger mode (sawtooth generation)
It is cleared by hardware.
0: No trigger
1: Trigger for sawtooth increment
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