廣泛用于網絡服務器、打印機控制器以及其它需要存儲大量代碼和數據的應用設備如銷售終端設備及外設、工廠自動化設備、串行協議網關、安全監控設備和樓宇自動化系統等.本文介紹了STR91xFA的主要特性,方框圖以及Keil 公司的MCBSTR9評估板的主要特性和詳細的電路圖.
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)
圖1.STR91xFA方框圖
Keil MCBSTR9評估板
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.
圖2. Keil MCBSTR9評估板外形圖
圖3. Keil MCBSTR9評估板電路圖(1)
圖4.Keil MCBSTR9評估板(2)
圖5.Keil MCBSTR9評估板(3)