Atmel SAM3U系列闪存MCU开发评估方案
Atmel 公司的SAM3U系列是基于32位ARM Cortex-M3 RISC 处理器的闪存微控制器(MCU),工作速率高达96MHz,并集成了256KB闪存和多达48KB SRAM,外设包括带嵌入收发器的高速USB器件端口,用于SDIO/SD/MMC的高速MCI,带NAND闪存控制器的外部总线接口, 4x USART, 2x TWI, 1x SPI以及1个PWM计时器,3x通用16位计时器,一个RTC,12位ADC和10位ADC,非常适合USB应用包括数据采集,PC外设和常高速桥接(USB到SDIO,USB到SPI,USB到外部总线接口).本文介绍了SAM3U系列主要特性, 144引脚和100引脚的SAM3U 方框图,以及SAM3U-EK 开发板主要元器件和接口,方框图和详细电路图.
Atmels SAM3U series is a member of a family of Flash microcontrollers based on the high performance 32-bit ARM Cortex-M3 RISC processor. It operates at a maximum speed of 96 MHz and features up to 256 Kbytes of Flash and up to 48 Kbytes of SRAM. The peripheral set includes a High Speed USB Device port with embedded transceiver, a High Speed MCI for SDIO/SD/MMC, an External Bus Interface with NAND Flash controller, 4x USARTs, 2x TWIs, 1x SPI, as well as 1 PWM timer, 3x general purpose 16-bit timers, an RTC, a 12-bit ADC and a 10-bit ADC.
The SAM3U architecture is specifically designed to sustain high speed data transfers. It includes a multi-layer bus matrix as well as multiple SRAM banks, PDC and DMA channels that enable it to run tasks in parallel and maximize data throughput.
It can operate from 1.62V to 3.6V and comes in 100-pin and 144-pin LQFP and BGA packages.
The SAM3U device is particularly well suited for USB applications: data loggers, PC peripherals and any high speed bridge (USB to SDIO, USB to SPI, USB to External Bus Interface).
SAM3U系列主要特性:
• Core
– ARM® Cortex™-M3 revision 2.0 running at up to 96 MHz
– Memory Protection Unit (MPU)
– Thumb®-2 instruction set
• Memories
– From 64 to 256 Kbytes embedded Flash, 128-bit wide access, memory accelerator, dual bank
– From 16 to 48 Kbytes embedded SRAM with dual banks
– 16 Kbytes ROM with embedded bootloader routines (UART, USB) and IAP outines
– Static Memory Controller (SMC): SRAM, NOR, NAND support. NAND Flash controller with 4-kbyte RAM buffer and ECC
• System
– Embedded voltage regulator for single supply operation
– POR, BOD and Watchdog for safe reset
– Quartz or resonator oscillators: 3 to 20 MHz main and optional low power 32.768 kHz for RTC or device clock.
– High precision
– One PLL for device clock and one dedicated PLL for USB 2.0 High Speed Device
– Up to 19 peripheral DMA (PDC) channels and 4-channel central DMA
• Low Power Modes
– Sleep and Backup modes, down to 2.5 μA in Backup mode.
– Backup domain: VDDBU pin, RTC, 32 backup registers
– Ultra low power RTC: 0.6 μA
• Peripherals
– USB 2.0 Device: 480 Mbps, 4-kbyte FIFO, up to 7 bidirectional Endpoints, dedicated DMA
– Up to 4 USARTs (ISO7816, IrDA®, Flow Control, SPI,
– Up to 2 TWI (I
– 3-Channel 16-bit Timer/Counter (TC) for capture, compare and PWM
– 4-channel 16-bit PWM (PWMC)
– 32-bit Real Time Timer (RTT) and RTC with calendar and alarm features
– 8-channel 12-bit 1Msps ADC with differential input mode and programmable gain stage, 8-channel 10-bit ADC
• I/O
– Up to 96 I/O lines with external interrupt capability (edge or level sensitivity),debouncing, glitch filtering and on-die Series Resistor Termination
– Three 32-bit Parallel Input/Outputs (PIO)
• Packages
– 100-lead LQFP, 14 x
– 100-ball LFBGA, 9 x
– 144-lead LQFP, 20 x
– 144-ball LFBGA, 10 x
图1.144引脚SAM3U 方框图
图2.100引脚SAM3U 方框图
SAM3U-EK 开发板
The SAM3U-EK board is based on the integration of an ARM® Cortex®-M3 processor with on-board fast PSRAM (pseudo-static RAM), NAND-Flash and a set of popular peripherals. It is designed to provide a high performance processor evaluation solution with high flexibility for various kinds of applications.
The SAM3U Evaluation Kit (SAM3U-EK) allows the evaluation of the SAM3U series devices. It has enough features to demonstrate most of the product’s capabilities to the users. The SAM3U-EK also features extension connectors to allow the users to add new interfaces in case they are not on-board.
The Atmel® SAM3U-EK toolkit contains the following items:
a SAM3U-EK board
power supply
universal input AC/DC power supply with US, Europe and
one 3V Lithium Battery type CR1225
one USB cable
one serial RS232 cable
A Welcome Letter
SAM3U-EK 开发板主要元器件和接口:
Here is the list of the main board components and interfaces:
SAM3U4E QFP chip with optional socket footprint
12 MHz crystal
32.768 KHz crystal
Optional SMB connector, for external system clock input
PSRAM
NAND-Flash
Backup
2.8 inch TFT color LCD display with touch-panel and backlight
UART port with level shifter IC
USART port with level shifter IC
Audio codec with input and output jacks: stereo headphone out, stereo line in, mono microphone in
SD/MMC interface
3-D accelerometer sensor
Temperature sensor
Reset and Wake-Up buttons: NRST, NRSTB, FWUP
User buttons: Left and Right
High Speed USB device port
JTAG port
On-board power regulation with shutdown control (by the SAM3 chip)
Two user LEDs
Power LED
BNC connectors for ADC input
User potentiometer connected to the ADC input
ZigBee® connector
3x32 bit PIO connection interfaces (PIOA, PIOB, PIOC)
图3. SAM3U-EK 开发板外形图
图4.SAM3U-EK 开发板方框图(1)
图5.SAM3U-EK 开发板方框图(2)
图6.SAM3U-EK 开发板电路图(1)
图7.SAM3U-EK 开发板电路图(2)
图8.SAM3U-EK 开发板电路图(3)
图9.SAM3U-EK 开发板电路图(4)
图10.SAM3U-EK 开发板电路图(5)
图11.SAM3U-EK 开发板电路图(6)
图12.SAM3U-EK 开发板电路图(7)
图13.SAM3U-EK 开发板电路图(8)
图14.SAM3U-EK 开发板电路图(9)
图15.SAM3U-EK 开发板电路图(10)
图16.SAM3U-EK 开发板电路图(11)
图17.SAM3U-EK 开发板电路图(12)
图18.SAM3U-EK 开发板电路图(13)