Nations N32G45 Series, User Manual

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253 / 838
Nations Technologies Inc.
Tel
：
+86-755-86309900
Email
：
info@nationstech.com
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China

Configure DAC_CTRL.T1SEL[2:0] and DAC_CTRL.T2SEL[2:0] as different values to select different trigger
sources.
 Configure DAC_CTRL.W1EN[1:0] and DAC_CTRL.W2EN[1:0] as “01” to select noise generation enable.

Configure DAC_CTRL.MA1SEL3:0] and DAC_CTRL.MA2SEL3:0] to the same value to get the same LFSR
register mask bit.

Put the data to be converted into the corresponding alignment data holding register.
When the DAC1 trigger event occurs, the counter value of the LFSR register 1 is added to the value of the
corresponding data holding register. The added value is transferred to the register DAC_DATO1 after a delay of 3
APB1 clock cycles, and the counter value of the LFSR register 1 will be updated at this time. When the DAC2 trigger
event occurs, the counter value of the LFSR register 2 is added to the value of the corresponding data holding register.
The added value is transferred to the register DAC_DATO2 after a delay of 3 APB1 clock cycles, and the counter
value of the LFSR register 2 will be updated at this time.
10.4.3 Independent triggers that generate different noises
The configuration process is as follows:

Configure DAC_CTRL.T1EN and DAC_CTRL.T2EN to enable trigger enable of DAC1 and DAC2.

Configure DAC_CTRL.T1SEL[2:0] and DAC_CTRL.T2SEL[2:0] as different values to select different trigger
sources.
 Configure DAC_CTRL.W1EN[1:0] and DAC_CTRL.W2EN[1:0] as “01” to select noise generation enable.

Configure DAC_CTRL.MA1SEL3:0] and DAC_CTRL.MA2SEL3:0] as different values to get different LFSR
register mask bits.

Put the data to be converted into the corresponding alignment data holding register.
When the DAC1 trigger event occurs, the counter value of the LFSR register 1 is added to the value of the
corresponding data holding register. The added value is transferred to the register DAC_DATO1 after a delay of 3
APB1 clock cycles, and the counter value of the LFSR register 1 will be updated at this time. When the DAC2 trigger
event occurs, the counter value of the LFSR register 2 is added to the value of the corresponding data holding register.
The added value is transferred to the register DAC_DATO2 after a delay of 3 APB1 clock cycles, and the counter
value of the LFSR register 2 will be updated at this time.
10.4.4 Independent triggers that generate the same triangle wave
The configuration process is as follows:

Configure DAC_CTRL.T1EN and DAC_CTRL.T2EN to enable trigger enable of DAC1 and DAC2.

Configure DAC_CTRL.T1SEL[2:0] and DAC_CTRL.T2SEL[2:0] as different values to select different trigger
sources.

Configure DAC_CTRL.W1EN[1:0] and DAC_CTRL.W2EN[1:0] as “1x” to select the triangle wave generation
enable.