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 ofapplications 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)

详情请见:

http://www.st.com/stonline/products/literature/ds/13495/str912faw42.pdf