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chibios:articles:stm32f1_vs_stm32l1 [2011/10/06 11:16]
giovanni [Internal organization]
chibios:articles:stm32f1_vs_stm32l1 [2011/10/06 11:16] (current)
giovanni
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 ===== Why make it different? ===== ===== Why make it different? =====
  
-The STM32 has been immensly successful so far, it is feature rich, scalable and supports an excellent variety of peripherals. Perfection is not of this world however so even the STM32F1xx had its limits. The STM32L1xx is a clear effort in pushing the platform forward.+The STM32 has been immensely successful so far, it is feature rich, scalable and supports an excellent variety of peripherals. Perfection is not of this world however so even the STM32F1xx had its limits. The STM32L1xx is a clear effort in pushing the platform forward.
  
 ===== Internal organization ===== ===== Internal organization =====
  
-Internally the STM32L1xx is much like che classic STM32F1xx, it shares all the peripherals, naming conventions and most details however, while being largely compatible with the STM32F1xx, some peripherals have been improved and enhanced.+Internally the STM32L1xx is much like the classic STM32F1xx, it shares all the peripherals, naming conventions and most details however, while being largely compatible with the STM32F1xx, some peripherals have been improved and enhanced.
 Let's examine the platform by analyzing differences. Let's examine the platform by analyzing differences.
  
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   - The USB clock is generated by dividing by two the PLL VCO clock, so it must be programmed to 96MHz, setting that clock to 96MHz requires the power mode 1 (1.8 volts), the USB is not available in power modes 2 and 3 (1.5 and 1.2 volts). The power mode is selected in the PWR_CR register, after reset the device is in power mode 2.   - The USB clock is generated by dividing by two the PLL VCO clock, so it must be programmed to 96MHz, setting that clock to 96MHz requires the power mode 1 (1.8 volts), the USB is not available in power modes 2 and 3 (1.5 and 1.2 volts). The power mode is selected in the PWR_CR register, after reset the device is in power mode 2.
  
-Everithing else is similar but the registers layout is different, a specific initialization driver is required.+Everything else is similar but the registers layout is different, a specific initialization driver is required.
  
 ==== GPIO ==== ==== GPIO ====
 
chibios/articles/stm32f1_vs_stm32l1.txt · Last modified: 2011/10/06 11:16 by giovanni
 
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