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1. 

   joyzhou
   Member

   Hi, everyone!
   I have a problem on the MCU type of maple_mini.

   (1) The main web page of leaflabs.com
   http://leaflabs.com/
   says that maple_mini :
   uses STM32F103RCBT6: a 32-bit ARM Cortex-M3 microprocessor at 72Mhz......

   (2)Recommended Reading'' section of this page
   http://leaflabs.com/docs/hardware/maple-mini.html#maple-mini-stdocs
   suggests
   STMicro documentation for **STM32F103CB** microcontroller:......''

   (3) It seems there are only 4 chars after '103'.

   (4) I have a maple_mini with STM32F103CBT6 on it. But it's not bought from an official store.

   (5) I guess it should be STM32F103CBT6 without 'R'.

   I am going to try other developping tools such as coocox, arm-gcc, hoping more free RAMs available for my codes, so the accurate type is needed.

   Thanks and regards.

   Posted 2 years ago #
2. 

   ala42
   Member

   F103C - 48 pins
   F103R - 64 pins
   F103V - 100 pins
   F103Z - 144 pins

   Posted 2 years ago #
3. 

   gbulmer
   Moderator

   As you can see at the manufacturer's web site:
   http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031/LN1565
   all 4 characters have a meaning

   STM32F103pfst
   p is the number of pins, as ala42 has explained
   f is the flash and RAM size, and the 'density group', which means how many peripherals, and what type of peripherals
   s is the surface mount package type, LQFP, BGA, WLCSP
   t is the temperature range the part is specified to operate at

   STM32F103R8T6 = 64pin (R) and 64KiB Flash/20KiB RAM (8), and is 'Medium-Density' (also due to the 8), LQFP (T), Industrial temperature range, –40 to 85 °C. (6)
   STM32F103REY7 = 64pin (R) and 512KiB Flash/64 KiB RAM, and is 'High-Density' which has more peripherals than the R8, and has DAC & SDIO (E), WLCSP64 'wafer level' package (Y), 7 = Industrial temperature range, –40 to 105 °C (7)

   The part numbering scheme is documented in the Part Numbering section on the datasheet, e.g.
   http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/CD00191185.pdf

   Posted 2 years ago #
4. 

   joyzhou
   Member

   to ala42 and gbulmer:
   Many thanks for your explanations.
   I downloaded the hardware design file - maplemini.pdf.
   The MCU type is STM32F103CBT6, without 'R'.
   It is a mistake in the main page.

   Posted 2 years ago #

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