1# STM32L053-Nucleo BSP Introduction
2
3[中文](README_zh.md)
4
5## MCU: STM32L053R8 @32MHz, 64KB FLASH,  8KB RAM
6
7The ultra-low-power STM32L053x6/8 microcontrollers incorporate the connectivity power of the universal serial bus (USB 2.0 crystal-less) with the high-performance Arm® Cortex®-M0+ 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (up to 64 Kbytes of Flash program memory, 2 Kbytes of data EEPROM and 8 Kbytes of RAM) plus an extensive range of enhanced I/Os and peripherals.
8
9The STM32L053x6/8 devices provide high power efficiency for a wide range of performance. It is achieved with a large choice of internal and external clock sources, an internal voltage adaptation and several low-power modes.
10The STM32L053x6/8 devices offer several analog features, one 12-bit ADC with hardware oversampling, one DAC, two ultra-low-power comparators, several timers, one low-power timer (LPTIM), three general-purpose 16-bit timers and one basic timer, one RTC and one SysTick which can be used as timebases. They also feature two watchdogs, one watchdog with independent clock and window capability and one window watchdog based on bus clock.
11Moreover, the STM32L053x6/8 devices embed standard and advanced communication interfaces: up to two I2C, two SPIs, one I2S, two USARTs, a low-power UART (LPUART), and a crystal-less USB. The devices offer up to 24 capacitive sensing channels to simply add touch sensing functionality to any application.
12The STM32L053x6/8 also include a real-time clock and a set of backup registers that remain powered in Standby mode.
13Finally, their integrated LCD controller has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.
14The ultra-low-power STM32L053x6/8 devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. They are available in the -40 to +125 °C temperature range. A comprehensive set of power-saving modes allows the design of low-power applications.
15
16#### KEY FEATURES
17
18- Ultra-low-power platform
19  - 1.65 V to 3.6 V power supply
20  - -40 to 125 °C temperature range
21  - 0.27 μA Standby mode (2 wakeup pins)
22  - 0.4 μA Stop mode (16 wakeup lines)
23  - 0.8 μA Stop mode + RTC + 8 KB RAM retention
24  - 88 μA/MHz in Run mode
25  - 3.5 μs wakeup time (from RAM)
26  - 5 μs wakeup time (from Flash memory)
27- Core: Arm® 32-bit Cortex®-M0+ with MPU
28  - From 32 kHz up to 32 MHz max.
29  - 0.95 DMIPS/MHz
30- Memories
31  - Up to 64 KB Flash memory with ECC
32  - 8KB RAM
33  - 2 KB of data EEPROM with ECC
34  - 20-byte backup register
35  - Sector protection against R/W operation
36- Up to 51 fast I/Os (45 I/Os 5V tolerant)
37- Reset and supply management
38  - Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
39  - Ultra-low-power POR/PDR
40  - Programmable voltage detector (PVD)
41- Clock sources
42  - 1 to 25 MHz crystal oscillator
43  - 32 kHz oscillator for RTC with calibration
44  - High speed internal 16 MHz factory-trimmed RC (+/- 1%)
45  - Internal low-power 37 kHz RC
46  - Internal multispeed low-power 65 kHz to 4.2 MHz RC
47  - PLL for CPU clock
48- Pre-programmed bootloader
49  - USART, SPI supported
50- Development support
51  - Serial wire debug supported
52- LCD driver for up to 8×28segments
53  - Support contrast adjustment
54  - Support blinking mode
55  - Step-up converted on board
56
57- Rich Analog peripherals
58  - 12-bit ADC 1.14 Msps up to 16 channels (down to 1.65 V)
59  - 12-bit 1 channel DAC with output buffers (down to 1.8 V)
60  - 2x ultra-low-power comparators (window mode and wake up capability, down to 1.65 V)
61- Up to 24 capacitive sensing channels supporting touchkey, linear and rotary touch sensors
62- 7-channel DMA controller, supporting ADC, SPI, I2C, USART, DAC, Timers
63- 8x peripheral communication interfaces
64  - 1x USB 2.0 crystal-less, battery charging detection and LPM
65  - 2x USART (ISO 7816, IrDA), 1x UART (low power)
66  - Up to 4x SPI 16 Mbits/s
67  - 2x I2C (SMBus/PMBus)
68- 9x timers: 1x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC, 1x 16-bit basic for DAC, and 2x watchdogs (independent/window)
69- CRC calculation unit, 96-bit unique ID
70- True RNG and firewall protection
71- All packages are ECOPACK®2
72
73
74
75## Read more
76
77|                          Documents                           |                         Description                          |
78| :----------------------------------------------------------: | :----------------------------------------------------------: |
79| [STM32_Nucleo-64_BSP_Introduction](../docs/STM32_Nucleo-64_BSP_Introduction.md) | How to run RT-Thread on STM32 Nucleo-64 boards (**Must-Read**) |
80| [STM32L053R8 ST Official Website](https://www.st.com/en/microcontrollers-microprocessors/stm32l053r8.html#documentation) |          STM32L053R8 datasheet and other resources           |
81
82
83
84## Maintained By
85
86 [sun_shine](https://github.com/xupenghu), <baozitai@163.com>
87
88
89
90## Translated By
91
92Meco Man @ RT-Thread Community
93
94> jiantingman@foxmail.com
95>
96> https://github.com/mysterywolf