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LPC3220 LPC3230 LPC3240 LPC3250用户开发指南:NXP Semiconductor designed the LPC32x0 for embedded applications requiring high
performance and low power consumption.
NXP achieved their performance objectives using an ARM926EJ-S CPU core with a
Vector Floating Point co-processor and a large set of standard peripherals, including USB
On-The-Go. Figure 1 shows a block diagram of the LPC32x0. The LPC32x0 operates at
CPU frequencies up to 266 MHz. The basic ARM926EJ-S CPU Core implementation uses
a Harvard architecture with a 5-stage pipeline. The ARM926EJ-S core also has an
integral Memory Management Unit (MMU) to provide the virtual memory capabilities
required to support the multi-programming demands of modern operating systems. The
basic ARM926EJ-S core also includes a set of DSP instruction extensions including single
cycle MAC operations and native Jazelle Java Byte-code execution in hardware. The NXP
implementation has one 32 KB Instruction Cache and one 32 KB Data Cache.
NXP LPC2300和LPC2400是市场上仅有的具有2个ARM高速总线（AHB）的ARM7 MCU产品，可以使得高频宽外设，例如Ethernet、USB On-The-Go（OTG）、USB主机端、CAN、SDRAM与片上内存等同时运行。NXP LPC2400同时也是业界唯一一款具有双端口USB主机端能力的ARM7 MCU产品，可以用来推动多重通讯应用的全新发展。双AHB总线与3个独立的直接内存读取引擎可以让多个高频宽外设同时运行而不会造成总线的负担，并将最差状况改善了50%以上，这使得NXP LPC2300与LPC2400非常适合多种高性能通信应用，例如工业网络、信息娱乐系统、消费与医疗设备、以及销售终端设备。
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