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The signal generator will produce sinewave and square wave (CMOS-compatible) fro...
yandrapragada

yandrapragada

@copilot The signal generator will produce sinewave and square wave (CMOS-compatible) from DC to 200 MHz with a resolution of 0.001 HZ, and have an excellent phase noise.
1y

copilot

To achieve your design requirement using the AD9850 and ATMEGA328P-MU, you can use the AD9850 as the Direct Digital Synthesis (DDS) chip to generate the waveforms.
Here’s how you can set up the DDS signal generation:
Configuration:
  • Frequency Range: The AD9850 can generate frequencies up to 200 MHz.
  • Resolution: Configure the AD9850 using its 40-bit frequency tuning word to achieve 0.001 Hz resolution.
  • Waveforms: The AD9850 can output both sine and square waves.
Connection Details:
  1. Power Supply:
    • Connect U1:DGND to GND.
    • Connect U1:DVDD and U1:AVDD to a suitable 3.3V or 5V supply.
  2. Microcontroller Interface (Parallel or Serial):
    • Connect U1:D0 to D7 for parallel data transfer or use U1:W_CLK, U1:FQ_UD for serial control.
    • Connect microcontroller I/O pins U2:PD3, U2:PD4, etc., to control lines of U1.
  3. Clock Input:
    • An external crystal oscillator can be connected to U1:CLKIN.
  4. Signal Output:
    • The sine wave output is available at U1:IOUT and U1:IOUTB.
    • The square wave output can be tapped from U1:QOUT or U1:QOUTB.
Programming:
  • Use the ATMEGA328P-MU to programmatically set frequencies and control the waveform outputs.
  • Implement a control algorithm to load frequency tuning words via the microcontroller to the AD9850.
Would you like more detailed guidance on specific connections or programming examples?
1y
2
connect this to U2
yandrapragada

yandrapragada

@copilot connect this to U2
1y

copilot

To connect the AD9850 (designator U1) to the ATMEGA328P-MU (designator U2), you can follow this typical connection setup:
  1. Power Connections:
    • Connect U1:DVDD to U2:VCC.
    • Connect U1:AVDD to U2:AVCC.
    • Connect U1:DGND and U1:AGND to U2:GND.
  2. Control Connections:
    • Connect U1:W_CLK to a digital output pin on U2, typically U2:PD0 or another available GPIO.
    • Connect U1:FQ_UD to another digital output pin on U2, such as U2:PD1.
    • Connect U1:RESET to a third digital output pin on U2, perhaps U2:PD2.
  3. Data Connections:
    • Connect U1:D0 to a digital pin on U2, like U2:PD3.
    • Continue connecting U1:D1 through U1:D7 to subsequent available digital pins on U2, such as U2:PD4 through U2:PB5.
  4. Oscillator and Reference:
    • If applicable, connect U1:CLKIN to an external clock, or leave it unconnected if using an internal oscillator.
This setup assumes you are using the ATmega328P to control the AD9850 via its parallel inputs. If you plan to use a different type of communication, like serial communication, you'll need to adjust the pin connections accordingly. Let me know if you have any specific requirements or constraints!
1y
3
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R7FA4M1AB3CFM General Design (USB C&SD Card) sL8Y thumbnail
This is the general design of the R7FA4M1AB3CFM with the minimum configuration for its operation and USB C with LDO and SD card #arm #M4 #IoT #referenceDesign #mcu #renesas #template #reference-design

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