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Schematic of i.MX RT1010 LoRa Logger
U2
Manufacturer Part Number
MIMXRT1011CAE4A
is X1 adequate for my design?

@copilot is X1 adequate for my design?
3y
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.
3y
2
is R13 correct as a pull-up resistor?

@copilot is R13 correct as a pull-up resistor?
3y
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.
3y
1
what is a good alternative part for MIMXRT1011

@copilot what is a good alternative part for MIMXRT1011
3y
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.
3y
4
R13
Resistance
10kΩ
C7
Capacitance
22uF
C5
Capacitance
4.7uF
R10
Resistance
30kΩ
R11
Resistance
0 Ω
C14
Capacitance
4.7uF
C28
Capacitance
4.7uF
C11
Capacitance
4.7uF
C9
Capacitance
10uF
C19
Capacitance
12pF
C10
Capacitance
0.1uF
C22
Capacitance
0.22uF
L1
Inductance
Inductance
C13
Capacitance
0.22uF
C12
Capacitance
0.22uF
X1
C8
Capacitance
0.22uF
C15
Capacitance
0.22uF
C6
Capacitance
0.22uF
C16
Capacitance
0.22uF

i.MX RT1010 LoRa Logger