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)