Here’s what each of those items is and does in your schematic:
3V3: Power net portal indicating the 3.3 V rail. It ties any connected pins/components to the 3.3 V supply across the schematic.
C26: 0402 capacitor connected to NVCC_GPIO. Functions as a local decoupling/bulk cap to stabilize the NVCC_GPIO I/O supply against transients and switching noise.
C27: 0402 capacitor on NVCC_GPIO. Additional decoupling placed physically near other sinks of this rail to reduce impedance at higher frequencies.
R11: 0402 resistor between +3V3 and NVCC_GPIO. Likely a 0 Ω link (or small value) used as an isolate/jumper for measurement, filtering option, or to split planes for bring-up and fault isolation.
C24: 0402 capacitor on NVCC_GPIO. High-frequency bypass (typically 100 nF) close to NVCC_GPIO pins of the MCU to shunt fast transients to ground.
C29: 0603 capacitor on NVCC_GPIO. Likely a larger value (e.g., 1 µF–4.7 µF) to provide local bulk energy and reduce low-frequency droop on the I/O rail.
C23: 0603 or 0402 capacitor on NVCC_GPIO. Another decoupling/bulk element; together with C24/C25/C26/C27 it forms a distributed decoupling network covering a broader frequency range.
NVCC_GPIO_3V3: Power net portal labeling the NVCC_GPIO rail as a 3.3 V I/O supply domain for the MCU’s GPIO banks. This makes the I/O level 3.3 V and ties the various decouplers to that domain.
C25: 0402 capacitor on NVCC_GPIO. Another close-in high-frequency decoupler to minimize loop area and keep the rail quiet near sensitive pins.
In short: +3V3 is your main 3.3 V rail. NVCC_GPIO_3V3/NVCC_GPIO is the 3.3 V domain feeding the MCU’s I/O supply pins. R11 links +3V3 to NVCC_GPIO (optionally allowing isolation). C23, C24, C25, C26, C27, and C29 are the decoupling/bulk capacitors distributed around that rail to ensure stable, low-noise operation.
Based on your provided information, Designator X1 is a crystal oscillator (ABS07-32.768KHZ-T). Crystal Oscillators are used in electronics to generate precise, stabilised frequencies and are crucial components in various devices such as communications equipment, computers, and watches.
The X1 oscillator frequency (32.768 kHz) is commonly used for real-time clocks (RTC). Looking at the information provided about the i.MX RT1010 MCU, it seems that this MCU indeed has an RTC (Real Time Clock) feature, which suggests the usage of a 32.768 kHz crystal. The data sheet for the i.MX RT1010 Crossover Processors (IMXRT1010HDG) also confirms that a nominal frequency of $32.768 \mathrm{kHz} $ is recommended for the oscillator.
The selected crystal (ABS07-32.768KHZ-T) should be suitable per the MCU's datasheet. However, you need to ensure that the load capacitance of the crystal matches the capacitance seen by the oscillator circuit on your board. You can calculate this value based on the parasitic capacitance of the board layout and the input capacitance of the oscillator circuit on the i.MX RT1010. If the crystal's load capacitance and the board capacitance don't match, the oscillator may not start or it may run at a different frequency than expected.
It is recommended to cross-check your circuit's load capacitance and compare it to the specified load capacitance of the Crystal. This frequency should also align with the requirements of your application.
For best performance, ensure that the layout of the oscillator circuit minimizes noise and parasitic capacitance by following the recommendations in the MCU's hardware design guide.
In conclusion, based on the info provided, your crystal seems to be appropriate. However, verifying load capacitance, layout considerations, and the specifications of your entire design is essential for ensuring its full functionality.
Based on the information provided, resistor R13 connects to JTAG_TRSTB with a resistance value of 10kΩ. Given its usage in the JTAG interface, it can very well be a pull-up resistor. A pull-up resistor in this case could be providing a default state (usually logic high or '1') when the JTAG line is not actively being driven. However, to verify whether R13 is a pull-up resistor or not, I would also need to know the other pin (P1) connection. If the other pin of R13 is connected to a logic high voltage level or VCC, it would strengthen the argument of R13 being a pull-up resistor.
For confirmation, please provide more details or check the connections as discussed. Making an assumption without additional information could lead to an incorrect interpretation of the circuit.
A good alternative would be the ATSAME53J19A-AU microcontroller from Microchip. It is also an Arm Cortex-M7 based microcontroller, running at up to 300 MHz, with better power efficiency. It has 512KB of Flash memory and 192KB of SRAM, a bit more memory than the i.MX RT1010. The ATSAME53 also contains a nice set of peripherals including SPI, USART, I2C, USB, and SDIO, similar to the i.MX RT1010. It can be a drop-in replacement if you're not utilizing the full speed of i.MX RT1010.
Keep in mind that when choosing an alternative part, you need to consider the specifics of your application, and it's important to assess not only the hardware characteristics but also the available software support, including drivers, middleware, and Real-Time Operating Systems (RTOS) support. Also, footprint compatibility is important for hardware design considerations.
However, it's crucial to assess these options carefully as they have different specifications, so one should ensure they meet the requirements of your specific project. As always, please refer to the respective datasheet for a detailed comparison among these options.
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
General Purpose Thick Film Standard Power
and High-Power Chip Resistor
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
Features:
- RMCF – standard power ratings
- RMCP – high power ratings
- Nickel barrier terminations standard
- Power derating from 100% at 70ºC to zero at +155ºC
- RoHS compliant, REACH compliant, and halogen free
- AEC-Q200 compliant
This project is a LoRa data logger implementing the i.MX RT1010 microcontroller. It collects and logs data through the LoRa-E5 module and stores the data via a TF card. Capacitors and resistors are used to construct the necessary circuits, ensuring proper functionality. This system is ideal for long-distance, low-power IoT applications. #project#LoRa#RT1010#SDCARD
Properties
Bare metal
Lora, JTAG
5V
Buttons, Display
Consumer Electronics
Pricing & Availability
Distributor
Qty 1
Digi-Key
$16.90–$17.06
LCSC
$10.44–$10.51
Mouser
$18.33
Controls
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