Atmel SAM L21 32位MCU超低功耗可穿戴解决方案

Atmel公司的SMART SAM L21是基于32位ARM® Cortex®-M0+处理器的超低功耗MCU,最大工作频率48MHz(2.46CoreMark®/MHz),集成了高达256KB闪存和40KB SRAM,具有极专业的电源管理技术,高度可配置的外设如支持容性和接近式传感器的触摸控制器,非常适合用在可穿戴和物联网(IoT)市场.本文介绍了SAM L21主要特性,功能框图以及可穿戴演示板ATULPC-DEMO主要特性,框图和电路图.
Atmel® | SMART SAM L21 is a series of Ultra low-power microcontrollers using the 32-bit ARM® Cortex®-M0+ processor, and ranging from 32- to 64-pins with up to 256KB Flash and 40KB of SRAM. The SAML21 devices operate at a maximum frequency of 48MHz and reach 2.46 CoreMark®/MHz. They aredesigned for simple and intuitive migration with identical peripheral modules, hex compatible code,identical linear address map and pin compatible migration paths between all devices in the productseries. All devices include intelligent and flexible peripherals, Atmel Event System for inter-peripheral signaling, and support for capacitive touch button, slider and wheel user interfaces.
The Atmel SAM L21 devices provide the following features: In-system programmable Flash, 16-channeldirect memory access (DMA) controller, 12-channel Event System, programmable interrupt controller, upto 51 programmable I/O pins, 32-bit real-time clock and calendar, up to five 16-bit Timer/Counters (TC)and three Timer/Counters for Control (TCC) where each TC/TCC can be configured to perform frequencyand waveform generation, accurate program execution timing or input capture with time and frequency measurement of digital signals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascadedto form a 32-bit TC, and three timer/counters have extended functions optimized for motor, lighting andother control applications. Two TCC can operate in 24-bit mode, the third TCC can operate in 16-bitmode. The series provide one full-speed USB 2.0 embedded host and device interface; up to six SerialCommunication Modules(SERCOM) that each can be ...