Bike Computer PCB Design

flux

0:32

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I'll need to ask a few quick questions to nail down your design. I have four questions; let's start with the first:
  1. Display Requirements: What type of display would you like (e.g., TFT, OLED, etc.) and which interface (e.g., SPI, parallel, MIPI)? You can either specify your preference or let me assume one if you’d like.
300 days
odaly

odaly

spi, I would like it to be a high quality colour display, oled could be good
300 days

flux

0:16

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Great—let's proceed.
  1. GPS Module Requirements: Do you have a specific GPS module in mind (for example, a u-blox module with high sensitivity and fast fix), or would you like a recommendation?
I want a recommendation
U-blox recommendation
Consider size constraints
300 days
imad-aero

imad-aero

what does the pj13 do
296 days

flux

0:23

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PJ13
PJ13 is a terminal component. Terminal components aren’t active—they serve as connection points in the schematic. In this case, PJ13 is defined as a bidirectional terminal (with pin number E10) and typical current handling ratings (0.02 A) suitable for signal connections. Its purpose is to provide a designated connection point in your PCB design, which can be used for wiring or interfacing with other parts of your circuit.
296 days

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explain this project.
willworknow

willworknow

@copilot explain this project.
1y

copilot

Sure! This project involves the STM32H743XIH6 microcontroller, which is an ARM® Cortex®-M7 32-bit microcontroller by STMicroelectronics. The STM32H7 series is known for high performance, integrating a high clock frequency of 480 MHz and abundant flash memory (2MB in this case).
Key points:
  • Microcontroller: STM32H743XIH6
  • Package: 240+25-TFBGA (14x14) (a small ball grid array package, suitable for high-density PCB designs)
Design Breakdown Power Pins:
  • VDD: Multiple pins for core voltage (typically 3.3V).
  • VSS: Ground pins.
  • VDDA/VSSA: Analog supply and ground, respectively.
  • VBAT: Backup battery supply for the RTC (Real-Time Clock) and standby domain.
  • VCAP1/VCAP2/VCAP3: Capacitor pins for internal voltage regulators.
GPIOs:
  • The microcontroller has a diverse set of bi-directional pins (labeled PAx, PBx, PCx, etc.), which are used for interfacing with peripherals. These pins can function as general I/O or be configured for specific alternate functions such as UART, SPI, I2C, etc.
  • BOOT0: Used to select the boot mode during reset.
  • NRST: Reset pin.
  • PDR_ON: Power-down reset on.
Not Connected (NC):
  • Some pins are marked as NC (not connected), meaning they are not used in this design.
Tasks To Do
Since "No electrical connections have been made in this project yet", you'll need to:
  1. Power Connections: Ensure all VDD, VSS, VDDA, and VSSA pins are appropriately connected to their respective power supplies.
  2. Capacitors: Place capacitors on VCAP1/2/3 pins as recommended by the manufacturer’s datasheet.
  3. Backup Supply: Connect VBAT to a battery or a backup power source.
  4. IO Configuration: Determine the functions (GPIO, UART, SPI, etc.) needed and configure the respective pins.
  5. Boot and Reset: Connect BOOT0 and NRST pins logically to facilitate programming and reset functionalities.
Example: Power Connections
For instance, the connections for the power pins might look something like:
- Connect external 3.3V to all VDD pins.
- Connect GND to all VSS pins.
- Connect specific capacitors to VCAP1, VCAP2, and VCAP3 as per the datasheet (typically 1uF).
- Connect 3.3V analog supply to VDDA and ground to VSSA.
- Connect a 3V coin cell battery to VBAT.
Example: GPIO Setup
For GPIO configuration, assume we want some pins for UART communication:
- PA2 $$USART2\_TX$$ to TX of UART device.
- PA3 $$USART2\_RX$$ to RX of UART device.
More specific connections will depend on your application requirements.
Assumptions
Given the lack of specific details about the end application, the initial assumptions are based on typical use cases of STM32H7 microcontrollers. Please provide further information if there are specific peripherals, communication protocols, or functionalities you need to integrate.
Do these explanations align with your project intentions, or are there specific aspects you would like more detail on?
1y
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STM32H743XIH6

STM32H743XIH6
Description

Created
Last updated by vasy_skral
1 Contributor(s)
vasy_skral

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Properties

Part Type
Microcontroller
Manufacturer Name
https://www.st.com/
Manufacturer Part Number
STM32H743XIH6
Designator Prefix
U

Availability & Pricing

DPNStockQty 1
17K$12.367
12.3K$20.25
12.6K$9.5524
1829$18.44
1020–25K$10.145–$22.6493

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