LPC3220 LPC3230 LPC3240 LPC3250用戶開發(fā)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是市場上僅有的具有2個ARM高速總線（AHB）的ARM7 MCU產(chǎn)品，可以使得高頻寬外設(shè)，例如Ethernet、USB On-The-Go（OTG）、USB主機端、CAN、SDRAM與片上內(nèi)存等同時運行。NXP LPC2400同時也是業(yè)界唯一一款具有雙端口USB主機端能力的ARM7 MCU產(chǎn)品，可以用來推動多重通訊應用的全新發(fā)展。雙AHB總線與3個獨立的直接內(nèi)存讀取引擎可以讓多個高頻寬外設(shè)同時運行而不會造成總線的負擔，并將最差狀況改善了50%以上，這使得NXP LPC2300與LPC2400非常適合多種高性能通信應用，例如工業(yè)網(wǎng)絡、信息娛樂系統(tǒng)、消費與醫(yī)療設(shè)備、以及銷售終端設(shè)備。