STM32L031E6Yx
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            CoreCortex-M0+, 32 MHz 
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            FamilySTM32L0 Series 
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            Sub-FamilySTM32L031 
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          CMSIS PackSTM32L0xx_DFP
Ultra-low-power STM32L0 MCUs with Arm Cortex-M0+ core, MPU, 0.95 DMIPS at 32 MHz.
| Core | Processor Cortex-M0+ | 
|---|---|
| Maximum Clock Frequency | 32 MHz | 
| Memory Protection Unit | NO_MPU | 
| Floating Point Unit | NO_FPU | 
| Trust Zone | |
| Digital Signal Processor | NO_DSP | 
| CortexM Vector Extensions | |
| Endian | Little-endian | 
| Features | View features | 
Processor
Cortex-M0+, 32 MHz
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      Package Chip Scale Package 25-ball Chip Scale Package 
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      Other 20-byte backup register 1 x 20-byte backup register Other Feature 1 x Other Feature 
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      Core features True Random Number Generator 1 x True Random Number Generator DMA Controller 7-channel DMA Controller 
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      Timer Timer/Counter 5 x 16-bit Timer/Counter Watchdog Timer 2 x Watchdog Timer 
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      Clock Real Time Clock 32.77 kHz Real Time Clock 
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      Communication Universal Synchronous Asynchronous Receiver Transmitter 3 x 4 Mbit/s Universal Synchronous Asynchronous Receiver Transmitter Inter-Integrated Circuit 2 x Inter-Integrated Circuit 
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      Spec Operating Temperature Range -40 °C .. +85 °C Operating Temperature Range 
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      Power Operating Voltage 1.65 V .. 3.6 V Operating Voltage