Atmel SAM4S 32位ARM Cortex－M4 MCU开发方案
Atmel公司的SAM4S系列是基于功能强大的 ARM® Cortex™-M4的处理器，工作频率高达 120MHz,具有增强的性能和功效,更高的存储器密度如高达 2MB 的闪存和 128KB 的 SRAM以及用于实现连接,系统控制和模拟接口的丰富外设,并集成了最佳硬件代码保护. 该系列与当前基于 SAM3 Cortex-M3 处理器的微控制器是管脚对管脚和软件兼容的，主要用在消费类电子和玩具,工业控制,测试测量,医疗电子, 802.15.4无线网络和手机.本文介绍了SAM4S系列主要特性, 100和64引脚方框图, 评估板SAM4S-EK2主要特性,框图,电路图,材料清单和PCB元件布局图.
The Atmel SAM4S series is a member of a family of Flash microcontrollers based on the high-performance 32-bit ARM® Cortex®-M4 RISC processor. It operates at a maximum speed of 120 MHz and features up to 2048 Kbytes of Flash, with optional dual-bank implementation and cache memory, and up to 160 Kbytes of SRAM. The peripheral set includes a full-speed USB Device port with embedded transceiver, a high-speed MCI for SDIO/SD/MMC, an External Bus Interface featuring a Static Memory Controller to connect to SRAM, PSRAM, NOR Flash, LCD Module and NAND Flash, two USARTs, two UARTs, two TWIs, three SPIs, one I2S, as well as one PWM timer, two three-channel general-purpose 16-bit timers (with stepper motor and quadrature decoder logic support), one RTC, one 12-bit ADC, one 12-bit DAC and one analog comparator.
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