Atmel_ATSAMR21LED驱动器参考设计课件.docx

Atmel ATSAMR21LED驱动器参考设计 Atmel公司的ATSAMR21是采用32位ARM?Cortex?-M0+处理器的低功耗微控制器,集成了超低功耗2.4GHz ISM频段收发器,256KB闪存,32KB SRAM,最大工作频率48MHz,达到2.46 Coremark/MHz,工作频率1.8V – 3.6V,主要用在ZigBee照明.本文介绍了SAM R21主要特性,MCU框图和内部连接图,以及具有ZigBee光连接的ATSAMR21 LED驱动器AT13518主要特性,电路图和材料清单,PCB设计图.The Atmel? | SMART? SAM R21 is a series of low-power microcontrollers using the 32-bit ARM?Cortex?-M0+ processor and an integrated ultra-low power 2.4GHz ISM band transceiver. SAMR21 devices are available in 32- and 48-pin packages with up to 256KB Flash, 32KB of SRAMand are operating at a maximum frequency of 48MHz and reach 2.46 Coremark/MHz. They aredesigned for simple and intuitive migration with identical peripheral modules, hex compatiblecode, identical linear address map and pin compatible migration paths between all devices in theproduct series. All devices include intelligent and flexible peripherals, Atmel Event System forinter-peripheral signaling, and support for capacitive touch button, slider and wheel userinterfaces.The Atmel SAM R21 devices provide the following features: In-system programmable Flash,optional 512KB serial Flash,12-channel direct memory access (DMA) controller, 12-channelEvent System, programmable interrupt controller, up to 28 programmable I/O pins, ultra-lowpower 2.4GHz ISM band transceiver with a data rate of 250kb/s, 32-bit real-time clock andcalendar, three 16-bit Timer/Counters (TC) and three 16-bit Timer/Counters for Control (TCC),where each TC can be configured to perform frequency and waveform generation, accurateprogram execution timing or input capture with time and frequency measurement of digitalsignals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascaded to form a 32-bitTC, and the three Timer/Counters for Control have extended functions optimized for motor,lighting and other control applications. The series provide one full-speed USB 2.0 embedded hostand device interface; up to five Serial Communication Modules (SERCOM) that each can be con