MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 239

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RM0008
Note:
12.3.9
Figure 48. DAC conversion (SW trigger enabled) with LFSR wave generation
DAC trigger must be enabled for noise generation, by setting the TENx bit in the DAC_CR
register.
Triangle-wave generation
It is possible to add a small-amplitude triangular waveform on a DC or slowly varying signal.
DAC triangle-wave generation is selected by setting WAVEx[1:0] to “10”. The amplitude is
configured through the MAMPx[3:0] bits in the DAC_CR register. An internal triangle counter
is incremented three APB1 clock cycles after each trigger event. The value of this counter is
then added to the DAC_DHRx register without overflow and the sum is stored into the
DAC_DORx register. The triangle counter is incremented while it is less than the maximum
amplitude defined by the MAMPx[3:0] bits. Once the configured amplitude is reached, the
counter is decremented down to 0, then incremented again and so on.
It is possible to reset triangle wave generation by resetting WAVEx[1:0] bits.
Figure 49. DAC triangle wave generation
APB1_CLK
SWTRIG
DOR
DHR
0x00
Doc ID 13902 Rev 9
0xAAA
Digital-to-analog converter (DAC)
0xD55
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