原标题：Atmel SMART SAM4S无线PIR照相机参考设计

　　Atmel公司的SMART SAM4S系列产品是基于32位ARM® Cortex®-M4 RISC内核的高性能闪存的微控制器,工作频率120MHz,集成了多达2048KB闪存和多达160KB SRAM,集成的外设包括带收发器的全速USB器件端口,用于SDIO/SD/MMC的高速MCI和用来连接SRAM,PSRAM,NOR闪存,LCD模块和NAND闪存的外部总线接口,以及2个USART,2个UART,2个TWI,3个SPI,I2S以及PWM计时器,两个3路通用16位计时器,RTC,12位ADC,12位DAC和模拟比较器,主要消费类电子,工业控制和PC外设.本文介绍了SMART SAM4S系列产品主要特性,框图,SAM4S-WPIR-RD参考设计板框图和电路图.

　　The Atmel®|SMART SAM4S series is a member of a family of Flashmicrocontrollers based on the high-performance 32-bit ARM® Cortex®-M4 RISCprocessor. It operates at a maximum speed of 120 MHz and features up to2048 Kbytes of Flash, with optional dual-bank implementation and cachememory, and up to 160 Kbytes of SRAM. The peripheral set includes a full-speedUSB Device port with embedded transceiver, a high-speed MCI forSDIO/SD/MMC, an External Bus Interface featuring a Static Memory Controller toconnect to SRAM, PSRAM, NOR Flash, LCD Module and NAND Flash, 2USARTs, 2 UARTs, 2 TWIs, 3 SPIs, an I2S, as well as a PWM timer, two 3-channel general-purpose 16-bit timers (with stepper motor and quadraturedecoder logic support), an RTC, a 12-bit ADC, a 12-bit DAC and an analogcomparator.

　　The SAM4S series is ready for capacitive touch, offering native support for theAtmel QTouch® library for easy implementation of buttons, wheels and sliders.

　　The Atmel|SMART SAM4S devices have three software-selectable low-powermodes: Sleep, Wait and Backup. In Sleep mode, the processor is stopped whileall other functions can be kept running. In Wait mode, all clocks and functions arestopped but some peripherals can be configured to wake up the system based onpredefined conditions. In Backup mode, only the low-power RTC and wakeuplogic are running.

　　The real-time event management allows peripherals to receive, react to and sendevents in Active and Sleep modes without processor intervention.

　　The SAM4S device is a medium-range general-purpose microcontroller with thebest ratio in terms of reduced power consumption, processing power andperipheral set. This enables the SAM4S to sustain a wide range of applicationsthat includes consumer, industrial control, and PC peripherals.SAM4S devices operate from 1.62V to 3.6V.

　　The SAM4S series is pin-to-pin compatible with the SAM3N, SAM3S series (48-64- and 100-pin versions), SAM4N and SAM7S legacy series (64-pin versions).

　　SMART SAM4S主要特性:

　　 Core

　　̶ ARM Cortex-M4 with 2 Kbytes of cache running at up to 120 MHz

　　̶ Memory Protection Unit (MPU)

　　̶ DSP Instruction Set

　　̶ Thumb®-2 instruction set

　　 Pin-to-pin compatible with SAM3N, SAM3S, SAM4N and SAM7S legacy products (64-pin version)

　　 Memories

　　̶ Up to 2048 Kbytes embedded Flash with optional dual-bank and cache memory, ECC, Security Bit and LockBits

　　̶ Up to 160 Kbytes embedded SRAM

　　̶ 16 Kbytes ROM with embedded boot loader routines (UART, USB) and IAP routines

　　̶ 8-bit Static Memory Controller (SMC): SRAM, PSRAM, NOR and NAND Flash support

　　 System

　　̶ Embedded voltage regulator for single supply operation

　　̶ Power-on-Reset (POR), Brown-out Detector (BOD) and Watchdog for safe operation

　　̶ Quartz or ceramic resonator oscillators: 3 to 20 MHz main power with failure detection and optional low-power

　　32.768 kHz for RTC or device clock

　　̶ RTC with Gregorian and Persian calendar mode, waveform generation in low-power modes

　　̶ RTC counter calibration circuitry compensates for 32.768 kHz crystal frequency inaccuracy

　　̶ High-precision 8/12 MHz factory-trimmed internal RC oscillator with 4 MHz default frequency for device startup,in-application trimming access for frequency adjustment

　　̶ Slow clock internal RC oscillator as permanent low-power mode device clock

　　̶ Two PLLs up to 240 MHz for device clock and for USB

　　̶ Temperature sensor

　　̶ Low-power tamper detection on two inputs, anti-tampering by immediate clear of general-purpose backupregisters (GPBR)

　　̶ Up to 22 Peripheral DMA (PDC) channels

　　 Low-power Modes

　　̶ Sleep, Wait and Backup modes; consumption down to 1 μA in Backup mode

　　 Peripherals

　　̶ USB 2.0 Device: 12 Mbps, 2668 byte FIFO, up to 8 bidirectional Endpoints, on-chip transceiver

　　̶ Up to two USARTs with ISO7816, IrDA®, RS-485, SPI, Manchester and Modem Mode

　　̶ Two 2-wire UARTs

　　̶ Up to two 2-Wire Interface modules (I2C-compatible), one SPI, one Serial Synchronous Controller (I2S), onehigh-speed Multimedia Card Interface (SDIO/SD Card/MMC)

　　̶ Two 3-channel 16-bit Timer Counters with capture, waveform, compare and PWM mode, Quadrature decoderlogic and 2-bit Gray up/down counter for stepper motor

　　̶ 4-channel 16-bit PWM with complementary output, fault input, 12-bit dead time generator counter for motorcontrol

　　̶ 32-bit Real-time Timer and RTC with calendar, alarm and 32 kHz trimming features

　　̶ 256-bit General Purpose Backup Registers (GPBR)

　　̶ Up to 16-channel, 1Msps ADC with differential input mode and programmable gain stage and auto calibration

　　̶ One 2-channel 12-bit 1Msps DAC

　　̶ One Analog Comparator with flexible input selection, selectable input hysteresis

　　̶ 32-bit Cyclic Redundancy Check Calculation Unit (CRCCU) for data integrity check of off-/on-chip memories

　　̶ Register Write Protection

　　 I/O

　　̶ Up to 79 I/O lines with external interrupt capability (edge or level sensitivity), debouncing, glitch filtering and ondieseries resistor termination

　　̶ Three 32-bit Parallel Input/Output Controllers, Peripheral DMA-assisted Parallel Capture mode

　　 Packages

　　̶ 100-lead packages

　　 LQFP – 14 x 14 mm, pitch 0.5 mm

　　 TFBGA – 9 x 9 mm, pitch 0.8 mm

　　 VFBGA – 7 x 7 mm, pitch 0.65 mm

　　̶ 64-lead packages

　　 LQFP – 10 x 10 mm, pitch 0.5 mm

　　 QFN – 9 x 9 mm, pitch 0.5 mm

　　 WLCSP – 4.42 x 4.72 mm, pitch 0.4 mm (SAM4SD32/SAM4SD16)

　　 WLCSP – 4.42 x 3.42 mm, pitch 0.4 mm (SAM4S16/S8)

　　 WLCSP – 3.32 x 3.32 mm, pitch 0.4 mm (SAM4S4/S2)

　　̶ 48-lead packages

　　 LQFP– 7 x 7 mm, pitch 0.5 mm

　　 QFN – 7 x 7 mm, pitch 0.5 mm

　　 Flash

　　̶ Built-in ECC (hamming), single error correction

　　̶ Security bit and lock bits

　　图.SAM4SD32/SD16/SA16 100引脚框图

　　SAM4S-WPIR-RD参考设计板

　　The SAM4S-WPIR-RD Reference Design Kit is based on SAM4S16C device. It introduces the application of Pas­sive InfraRed Motion Detector Camera.

　　This User Guide gives design details on the Reference Design Kit and is made up of 4 sections:

　　Section 1 includes a photo of the board, references and applicable documents.

　　Section 2 describes the contents and the main features of the Reference Design Kit. 

　　Section 3 provides instructions to power up the board and describes how to use it.

　　Section 4 describes the hardware resources, function blocks, connectors and schematics.

　　图8. SAM4S-WPIR-RD参考设计板外形图