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AN3126

12/24

Doc ID16895 Rev 2

For more details about the triangular waveform, please read the dedicated sections in the

reference manuals of the STM32 products.

The triangular waveform frequency is related to the frequency of the trigger source.

Figure 8. Triangular waveform

The offset of the triangular waveform is programmable (see Figure 9). By varying the offset

of the triangular waveform with a preconfigured table of offsets (signal pattern), user can

obtain a waveform which corresponds to the sum of the signal pattern and the triangular

waveform.

Table 3. Preprogrammable triangular waveform amplitude values

MAMPx[3:0] bits

Digital Amplitude

Analog Amplitude (Volt)

(with Vref+ = 3.3V)

0

1

0.0016

1

3

0.0032

2

7

0.0064

3

15

0.0128

4

31

0.0257

5

63

0.0515

6

127

0.1031

7

255

0.2062

8

511

0.4125

9

1023

0.8250

10

2045

1.6483

4095

3.3000

ai18307

3.3V

Time

0V

Offset

Frequency

Amplitude