NXP Keil LPC122x 32位ARM MCU开发方案

NXP公司的LPC122x系列是基于ARM Cortex-M0的32位MCU,工作频率高达45MHz,闪存从32KB到128KB,并集成了多种外设包括10位ADC,两个比较器,两个UART,SSP/SPI接口,I2C总线接口,看门狗定时器,DMA控制器,CRC引擎,四个通用定时器,32位RTC等.主要用在照明,家用电器,智能电表,工业网络,,告警系统,白色家电.本文介绍了LPC122x主要特性和优势,框图,以及Keil MCB1200评估板主要特性,框图和电路图.
The LPC122x extend NXPs 32-bit ARM microcontroller continuum and target a wide range of industrial applications in the areas of factory and home automation. Benefitting from the ARM Cortex-M0 Thumb instruction set, the LPC122x have up to 50 % higher code density compared to common 8/16-bit microcontroller performing typical tasks. The LPC122x also feature an optimized ROM-based divide library for Cortex-M0, which offers several times the arithmetic performance of software-based libraries, as well as highly deterministic cycle time combined with reduced flash code size. The ARM Cortex-M0 efficiency also helps the LPC122x achieve lower average power for similar applications.
The LPC122x operate at CPU frequencies of up to 45 MHz. They offer a wide range of flash memory options, from 32 kB to 128 kB. The small 512-byte page erase of the flash memory brings multiple design benefits, such as finer EEPROM emulation, boot-load support from any serial interface and ease of in-field programming with reduced on-chip RAM buffer requirements.
The peripheral complement of the LPC122x includes a 10-bit ADC, two comparators with output feedback loop, two UARTs, one SSP/SPI interface, one I2C-bus interface with Fast-mode Plus features, a Windowed Watchdog Timer, a DMA controller, a CRC engine, four general purpose timers, a 32-bit RTC, a 1 % internal oscillator for baud rate generation, and up to 55 General Purpose I/O (GPIO) pins.
LPC122x主要特性和优势:
 Processor core
 ARM Cortex-M0 processor, running at frequencies of up to 45 MHz (one wait state
from flash) or 30 MHz (zero wait states from f...