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boards:wio-e5 [2022/12/29 03:52]
darron [Programming] 		boards:wio-e5 [2022/12/31 19:18] (current)
darron [STM32WLE5JC]
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 </wrap> </wrap>
  
-STM32WLE5JC+This board has a package containing a STM32WLE5JC cortex-m4 microcontroller at 48 MHz. 
 + 
 +The MCU does not contain a FPU, only the mandatory DSP for m4 
 +cores, but it does have an embedded radio, it appears to be an SX1262. 
 + 
 + 
 +===STM32WLE5JC=== 
 + 
 +RAM is in two 32K banks, which may be addressed separately or contiguously. The 
 +second bank has extended features when used separately.
  
 <code> <code>
 256K FLASH 256K FLASH
-64K RAM (2 banks of 32K)+64K RAM
 AES 256 AES 256
 LoRa LoRa
-FPU not present 
 </code> </code>
 +
 +There is a warning in the reference manual on page 185 of RM0461 Rev 5:
 +
 +"The SMPS needs a clock to be functional. If for any reason this clock stops,
 +the device may be destroyed."
 +
 +I probably would not have bothered with this board had I read the above warning beforehand.
 +Who designs a MCU that can self destruct if a bit doesn't get set in error?
 +
  
 ===Test=== ===Test===
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 ===Clock=== ===Clock===
  
-HSE 32MHz TCXO+On reset the MCU uses the MSI clock at 4 MHz. 
 + 
 +==HSE== 
 + 
 +32MHz TCXO
  
 <code> <code>
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 </code> </code>
  
-LSE 32.768KHz+==LSE==
  
 +32.768KHz
 ===Antenna=== ===Antenna===
  
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 [[https://www.st.com/resource/en/application_note/an5457-rf-matching-network-design-guide-for-stm32wl-series-stmicroelectronics.pdf|MCU RF design guide]] [[https://www.st.com/resource/en/application_note/an5457-rf-matching-network-design-guide-for-stm32wl-series-stmicroelectronics.pdf|MCU RF design guide]]
  
 +[[https://www.farnell.com/datasheets/2829356.pdf|SX1262 datasheet]]