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Check that none of the unconnected pins require pull-up or pull-down resistors t...
ziondido

ziondido

@copilot Check that none of the unconnected pins require pull-up or pull-down resistors to ensure proper function.
2y

copilot

Given the components listed in your project, you have two Hirose Electric DF40C-100DS-0.4V51 connectors (designated as J1 and J2) and a Silvertel AG9712-2BR module. To determine the need for pull-up or pull-down resistors on unconnected pins, we need to consider the typical usage and datasheets of these components.
For Hirose Electric DF40C-100DS-0.4V51 Connectors (J1 and J2)
These are connectors, and the need for pull-up or pull-down resistors on their pins depends on what they connect to. Generally, for connector pins directly interfacing with microcontrollers (MCUs) or other integrated circuits (ICs), it's the connected IC's datasheet (in this case, possibly a compute module like Raspberry Pi CM4's GPIOs) that specifies whether certain lines require pull-up or pull-down resistors. Such resistors are often used for I2C bus lines (SDA/SCL with pull-ups), GPIOs configured for certain functionalities, or to ensure a defined state on unused pins.
For Silvertel AG9712-2BR Module
  • VA1, VA2, VB1, and VB2: These pins are typically associated with the VoIP analog output interface. In most applications, they won't require pull-up or pull-down resistors but should be appropriately filtered and connected according to the module's application circuits.
  • IC_1 and IC_2: These pins are internally connected and often don't require any external resistors. They are typically used for factory testing or specific configurations based on the datasheet or application notes.
  • NC (No Connection): This pin should not be connected and thus does not require any resistor.
  • -VDC and +VDC: These are power supply pins and will not need pull-up or pull-down resistors. Ensure they are connected to the appropriate power source as specified in the datasheet.
  • ADJ: Depending on the specific use case (e.g., output voltage adjustment), this pin might be left unconnected or connected through a resistor to ground or VDC. Check the datasheet for any specific guidance.
Recommendations:
  • Cross-reference the datasheets: For all ICs and modules you are interfacing with (especially for the CM4 module connected to the DF40C-100DS-0.4V51 connectors), carefully check their datasheets or application notes for any specific instructions on pull-up or pull-down resistors.
  • Default assumption for GPIOs: If specific guidance is not available and you have unconnected GPIO pins, a common practice is to add 10kΩ pull-up or pull-down resistors to keep them in a known state and prevent floating inputs, but this depends on the intended circuit's behavior.
Please check the datasheets or application notes for the specific components you're interfacing with (Raspberry Pi CM4 for J1 and J2, and the specific application circuit for AG9712-2BR) for definitive guidance. Without exact details on the connections and external circuitry, the recommendations above are based on common practices and may need adjustments to fit your exact requirements.
2y
1
J2
J1
J3
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
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  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
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    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
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  • Generic Resistor
    Generic Resistor
    A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
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  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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  • Generic Inductor
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  • Terminal
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CM4 Template

CM4 Template thumbnail
This is a template for easy and fast developing HAT for RPI CM4! #RPI #CM4 #Template

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