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Replacing an STM32F101CBT6 microcontroller involves desoldering the original chip, soldering a new one, and, crucial to the process,
reprogramming the new chip with the necessary firmware, as new STM32 chips are blank. This 32-bit ARM Cortex-M3 chip is commonly found in LQFP-48 packaging.Here is a guide to replacing the chip based on common industry practices:
1. Requirements for Replacement
- New Chip: STM32F101CBT6 (LQFP-48 package).
- Tools: Hot air rework station, solder paste, flux, soldering iron, and tweezers.
- Programmer: ST-Link V2 or similar SWD programmer to flash the firmware.
- Firmware: A
.binor.hexfile containing the code from the original device.
2. The Replacement Process
- Chip Removal: Use a hot air rework station to remove the old STM32F101CBT6 chip.
- Board Preparation: Clean the solder pads on the PCB using a soldering iron and solder wick.
- Soldering the New Chip: Apply flux and new solder paste, align the new chip (ensuring pin 1 is correctly oriented), and use the hot air station to reflow the solder.
- Verification: Ensure all pins are soldered correctly and there are no bridges.
3. Programming (Crucial Step)
A new, blank chip will not function on your board.
- SWD Connection: Connect an ST-Link programmer to the SWD pins (SWDIO - Pin 34, SWCLK - Pin 37, NRST - Pin 7, 3.3V, GND).
- Flash Firmware: Use STM32CubeProgrammer or similar software to flash the required firmware onto the new chip.
4. Alternatives and Compatibility
- Direct Replacements: Other 128KB flash chips in the same family (e.g., STM32F103CBT6, though it has different peripheral speeds) may work, but using the exact part number is recommended to avoid compatibility issues.
- Clone/Compatible Chips: GD32F101CBT6 or N32G452CBL7 can be used as alternatives.
- Alternative Source: For easier replacement, you can scavenge a working chip from an identical broken board.
5. Potential Pitfalls
- Readout Protection: If the original chip had read protection enabled, you might not be able to extract the firmware to flash onto the new chip.
- Incorrect Firmware: If the firmware is not specifically for the F101CBT6, the device will not work.
- Heat Damage: Using too high a temperature with the hot air gun can damage the new chip or the PCB pads.
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eBay
https://www.ebay.com › ... › Couplers
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STM32F101CBT6TR Manufacturer, STM32F101CBT6TR Supplier
icyi.com
https://www.icyi.com › stm32f101cbt6tr
icyi.com
https://www.icyi.com › stm32f101cbt6tr
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Reddit · r/AskElectronics
60+ comments · 2 years ago
Reddit · r/AskElectronics
60+ comments · 2 years ago
The only thing you would need for that is an stlink programmer and an lqftpt board or qfp Jig to mount the original chip for firmware extraction ...Read more
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DigiKey
https://www.digikey.com › ... › Microcontrollers
DigiKey
https://www.digikey.com › ... › Microcontrollers
Order today, ships today. STM32F101CBT6 – ARM® Cortex®-M3 STM32F1 Microcontroller IC 32-Bit 36MHz 128KB (128K x 8) FLASH 48-LQFP (7x7) from ...
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AliExpress
https://www.aliexpress.com › item
AliExpress
https://www.aliexpress.com › item
New Original STM32F101C8T6 STM32F101CBT6 STM32F101RCT6 101C8T6 101CBT6 101RCT6 Quality Assurance In Stock IC CHIP ; Free shipping. Delivery: Jan. 10 ; Delivery: ...Read more
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https://www.rcgroups.com › forums › showthread › 26...
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STMicroelectronics Community
https://community.st.com › stm32-mcus-products › td-p
STMicroelectronics Community
https://community.st.com › stm32-mcus-products › td-p
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电子工程世界（EEWorld）
https://en.eeworld.com.cn › bbs › forum
电子工程世界（EEWorld）
https://en.eeworld.com.cn › bbs › forum
N32G452CBL7 can replace: STM32F101CBT6, STM32F103CBT6 GD32F101CBT6, GD32F103CBT6, GD32F330CBT6 ... 【Download】STM32 chip platform, RTThread domestic OS?
STM32F101CBT6 ST LQFP-48 Processors / Microcontrollers
Veswin Electronics
https://www.veswin.com › product-STM32F101CBT6
Veswin Electronics
https://www.veswin.com › product-STM32F101CBT6
A: Yes, Our product technical engineer will help you with the STM32F101CBT6 pinout information, application notes, replacement, datasheet in pdf, manual, ...Read more