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Q1
recommend a replacement for U3.
gasse

gasse

@copilot recommend a replacement for U3.
2y

copilot

Sure, I'll provide you a replacement of U3. As you currently have an STM32F103RCT6, a suitable replacement should have similar parameters. Here is a good alternative:
Designator: U3_Alternate MPN: STM32F303CCT6 Manufacturer Name: STMicroelectronics
The STM32F303CCT6 is also an ARM-Cortex M4 microcontroller with an operating frequency of up to 72 MHz, similar to the STM32F103RCT6. The STM32F303CCT6 series focuses on motor control, medical applications, and applications requiring high analog performance thanks to its high analog integration.
It's important to note that it's not always a drop-in replacement due to different pinouts or additional features which might not be available on the previous part. Therefore you might need to make changes to your schematic and PCB design to accommodate this new part. Do you want advice on how to modify your project to accommodate this new part?
2y
2y

copilot

Sure, here's how you could adjust your project to accommodate the new STM32F303CCT6:
  1. Power Connections: Connect VDD and VSS pins to the power supply. These include pins 19, 31, 47, and 63 for VDD and 18, 31, 47, and 63 for VSS on U3_Alternate which should connect to VIN and GND on U2 (the ADP7142ARDZ-3.3) respectively.
  2. GND Connections: For the analog ground AVSS at pin 12, this should be connected to a clean ground, separate from the digital ground if possible. AGND (pin 1) on U1 (the M95FA-03-STDN) may be suitable for this.
  3. I/O Connections: Depending on the functions needed, I/O lines should be connected accordingly. This includes UART, SPI, I2C, or other peripheral connections. For example RXD and TXD on U1 could connect to the corresponding UART TX and RX pins on U3_Alternate (USART1_TX is PA9 (pin 42), and USART1_RX is PA10 (pin 43).
  4. GPIO Connections: For GPIO, connect required pins to the necessary peripherals. This is application-specific and depends on other components in the circuit.
Truth be told, direct replacement may often require a new board revision, as pin compatibility between microcontrollers from the same family (or even different families from the same manufacturer) is not guaranteed.
Just a reminder: Always verify these changes using the datasheets for each component, especially as this is more of an "in-principle" replacement suggestion.
2y
1
U1
End of Life
U2 VIN - U2 GND
U3
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Private Azure Robot Vacuum

Private Azure Robot Vacuum thumbnail
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