ST STR91xFA 32位MCU开发方案

        ST公司的STR91xFA是基于ARM966E-S™RISC内核的16/32位闪存MCU,它集成了以太网,USB,CAN,AC马达控制,4个计时器,ADC,RTC以及DMA. STR91x FA的工作频率为96MHz,具有5级流水线和Harvard架构.

        广泛用于网络服务器、打印机控制器以及其它需要存储大量代码和数据的应用设备如销售终端设备及外设、工厂自动化设备、串行协议网关、安全监控设备和楼宇自动化系统等.本文介绍了STR91xFA的主要特性,方框图以及Keil 公司的MCBSTR9评估板的主要特性和详细的电路图.

       STR91xFAxxx:ARM966E-S™ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA

       STR91xFA is a series of ARM-powered microcontrollers which combines a 16/32-bit
ARM966E-S RISC processor core, dual-bank Flash memory, large SRAM for data or code, and a rich peripheral set to form an ideal embedded controller for a wide variety of  applications such as point-of-sale terminals, industrial automation, security and
surveillance, vending machines, communication gateways, serial protocol conversion, and medical equipment. The ARM966E-S core can perform single-cycle DSP instructions, good for speech processing, audio algorithms, and low-end imaging.

       STR91xFA主要特性:
       16/32-bit 96 MHz ARM9E based MCU
       ARM966E-S RISC core: Harvard architecture, 5-stage pipeline, Tightly-Coupled        Memories (SRAM and Flash)
       STR91xFA implementation of core adds high-speed burst Flash memory interface,        instruction prefetch queue, branch cache
       Up to 96 MIPS directly from Flash memory
       Single-cycle DSP instructions supported
       Binary compatible with ARM7 code
       Dual burst Flash memories, 32-bits wide
       256 KB/512 KB/1 MB/2 MB Main Flash
       32 KB/128 KB Secondary Flash
       Sequential Burst operation up to 96 MHz
       100 K min erase cycles, 20 yr min retention
       SRAM, 32-bits wide
       96K bytes, optional battery backup
       9 programmable DMA channels
       Clock, reset, and supply management
       Internal oscillator operating with external 4-25 MHz crystal
       Internal PLL up to 96 MHz
       Real-time clock provides calendar functions, tamper, and wake-up functions
       Reset Supervisor monitors supply voltage, watchdog, wake-up unit, external reset
       Brown-out monitor
       Run, Idle, and Sleep Mode as low as 50 uA
       Vectored interrupt controller (VIC)
       32 IRQ vectors, 30 interrupt pins
       Branch cache minimizes interrupt latency
       8-channel, 10-bit A/D converter (ADC)
       0 to 3.6 V range, 0.7 usec conversion
       10 Communication interfaces
       10/100 Ethernet MAC with DMA and MII
       USB Full-speed (12 Mbps) slave device
       CAN interface (2.0B Active)
       3 16550-style UARTs with IrDA protocol
       2 Fast I2C™, 400 kHz
       2 channels for SPI™, SSI™, or Microwire
       External Memory Interface (EMI)
       8- or 16-bit data, up to 24-bit addressing
       Static Async modes for LQFP128
       Additional burst synchronous modes for LFBGA144
       Up to 80 I/O pins (muxed with interfaces)
       16-bit standard timers (TIM)
       4 timers each with 2 input capture, 2 output compare, PWM and pulse count modes
       3-Phase induction motor controller (IMC)
       JTAG interface with boundary scan
       Embedded trace module (ARM ETM9)

                                                             图1.STR91xFA方框图

       Keil MCBSTR9评估板

      The Keil MCBSTR9 Evaluation Board introduces you to the STMicroelectronics STR9 ARM family and allows you to create and test working programs for this advanced architecture.
      The Keil MCBSTR9 Evaluation Board connects to your PC using the JTAG interface. It provides Serial (RS-232), CAN, Ethernet, and USB interfaces as well as eight LEDs, analog input (via potentiometer), and several push buttons.

图2. Keil MCBSTR9评估板外形图

图3. Keil MCBSTR9评估板电路图(1)

                                             图4.Keil MCBSTR9评估板(2)



                                               图5.Keil MCBSTR9评估板(3)

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本文来源：ST公司    作者：

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