Power net portal is a special schematic object used to define a power or ground net. Power ports allow you to conveniently indicate a power net at any location in the design. Power nets of the same designator automatically connect throughout your design #portal #power
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
Given your oscillator configuration with XTAL1, Y1, and XTAL2, along with the connections specified in your project, let's review the correct wiring and the addition of bypass capacitors:
Oscillator Wiring:
XTAL1 is connected to **IC1:(PCINT6/XTAL1/TOSC1)PB6 through Net: 58ed27694bacacda9894544ec41cc48d. This is a correct connection for the crystal oscillator's first pin to the microcontroller (ATMEGA328P-AU)'s XTAL1 input.
XTAL2 is connected to **IC1:(PCINT7/XTAL2/TOSC2)PB7 through Net: eeaf63694ecae8e4d6b138bb2fe44bc8. This is a correct connection for the crystal oscillator's second pin to the microcontroller's XTAL2 input.
This configuration suggests that the connections for the oscillator are correctly made for a standard ATmega328P crystal oscillator setup.
Bypass Capacitors:
Bypass capacitors are not typically added directly to the crystal oscillator pins (XTAL1 and XTAL2) but are used in the circuit for decoupling purposes on the power supply lines (VCCs and GNDs) to minimize noise. However, for a crystal oscillator circuit, loading capacitors are often required between each XTAL pin and ground (not to be confused with bypass capacitors). These loading capacitors are used to ensure the oscillator starts up and oscillates reliably, and their value is determined based on the crystal's specifications and the microcontroller's input capacitance.
Given your setup, assuming a common ATmega328P configuration and a standard crystal (like the one you have), you might typically see loading capacitors in the range of $12-22$ pF. However, these are not explicitly mentioned in your project description. If you haven't already, you should indeed add these loading capacitors as follows:
Connect one capacitor between XTAL1 (Y1:1) and a ground pin.
Connect another capacitor between XTAL2 (Y1:3) and a ground pin.
For the value, refer to your crystal's (Y1) datasheet and the ATmega328P specifications to calculate the appropriate value. If you’re using a standard setup, values around $22$ pF are a common choice, but this can vary based on the specifics of your components.
Note: Ensure to check the datasheet of your specific crystal oscillator model (Y1) for recommended loading capacitor values or any additional specific recommendations.
Each 3D camera module can be either set as SPI slave or master, one master shall transmit camera capture command and collect images from other modules before outputting to USB C port to external PC.
8mo
28
Vusb shall output minimum of 5V and 3A to IC an 4 camera modules
To outline an SPI (Serial Peripheral Interface) connection, we need to identify the Serial Data Input (SDI), Serial Data Output (SDO), Serial Clock (SCK), and Chip Select (CS) pins on the component U2. Based on the pinout of U2 provided in your project description and considering typical SPI communication lines, here's how the SPI interface for U2 would be mapped out:
Serial Clock (SCK): Typically, SPI communication requires a clock line to synchronize data transmission. For U2, the clock could be associated with the pin labeled as CLK, which is U2:5 (CLK).
Master In Slave Out (MISO): This line is used by the slave to send data to the master. There's no direct indication of a MISO pin in the description of U2, but for SPI, data lines like DAT0 or DAT1 could potentially be used depending on the specific configuration and operation mode of the device. Unfortunately, without specific SPI designation, an assumption here is challenging.
Master Out Slave In (MOSI): This is used by the master to send data to the slave. Similar to MISO, there's no direct indication, but DAT lines could serve this purpose.
Chip Select (CS): This line is used to activate the slave device. The designation of a specific Chip Select pin is not provided in the U2 description. However, in SPI communication, any General-Purpose Input/Output (GPIO) pin configured for output can function as a CS pin if the device supports such configuration.
Given these considerations, without direct indications for MISO and MOSI pin definitions in your provided information for U2 (MPN: 0472192001), I've made assumptions based on typical SPI configurations. For precise implementation, you would need to consult the datasheet of U2 to confirm the exact pins for MOSI and MISO functionality. Usually, manufacturers will provide detailed pin functions, including which are capable of serving as SPI communication lines.
To summarize, the potential SPI interface on U2 could be understood as:
SCK: U2:5 (CLK)
MISO: Undefined in provided data - potentially U2:11 (DAT1) or another DAT pin for reading data from U2.
MOSI: Undefined in provided data - potentially U2:12 (DAT0) or another DAT pin for sending data to U2.
CS: Not specified - any GPIO pin configured as output could act as CS when connected to U2 in an SPI setup.
For exact mapping and to ensure the correct operation, please refer to the datasheet or technical documentation of the U2 component.
9mo
7
Check the insertion loss of the cable harness you are using based on the SPI fre...
cwong7