NXP LPC1857 ARM Cortex-M3 32位MCU开发方案

NXP公司的LPC1857/53是基于ARM Cortex-M3内的 32位MCU，具有高达1MB闪存，136kB SRAM，以太网和两个高速USB以及LCD和EMC等。ARM Cortex-M3处理器工作频率高达180MHz，内置了支持8个区域的存储器保护单元（MPU）和嵌套向量中断控制器 (NVIC)，具有丰富外设，主要用在工业控制，RFID阅读器，电子测量仪器，消费类电子和白色家电。本文介绍了LPC1857/53主要特性和优势，方框图，以及Hitex LPC1850评估板主要特性，电路图和元件布局图。

The LPC1857/53 are ARM Cortex-M3 based microcontrollers for embedded applications.

The ARM Cortex-M3 is a next generation core that offers system enhancements such as low power consumption, enhanced debug features, and a high level of support block integration.

The LPC1857/53 operate at CPU frequencies of up to 180 MHz. The ARM Cortex-M3 CPU incorporates a 3-stage pipeline and uses a Harvard architecture with separate local instruction and data buses as well as a third bus for peripherals. The ARM Cortex-M3 CPU also includes an internal prefetch unit that supports speculative branching.

The LPC1857/53 include up to 1 MB of flash and 136 kB of on-chip SRAM, 16 kB of EEPROM memory, a quad SPI Flash Interface (SPIFI), a State Configurable Timer (SCT)subsystem, two High-speed USB controllers, Ethernet, LCD, an external memory controller, and multiple digital and analog peripherals.
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