LPC3220 LPC3230 LPC3240 LPC3250用戶開發指南: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產品，可以使得高頻寬外設，例如Ethernet、USB On-The-Go（OTG）、USB主機端、CAN、SDRAM與片上內存等同時運行。NXP LPC2400同時也是業界唯一一款具有雙端口USB主機端能力的ARM7 MCU產品，可以用來推動多重通訊應用的全新發展。雙AHB總線與3個獨立的直接內存讀取引擎可以讓多個高頻寬外設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，例如工業網絡、信息娛樂系統、消費與醫療設備、以及銷售終端設備。