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LPC1225FBD64

Description
Cortex-M0 with up to 80 kB Flash, 8 kB SRAM, RTC, comparators, 10-bit ADC, CRC, DMA and more
File Size2MB,50 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
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LPC1225FBD64 Overview

Cortex-M0 with up to 80 kB Flash, 8 kB SRAM, RTC, comparators, 10-bit ADC, CRC, DMA and more

LPC122x
产品数据手册
32-½ ARM Cortex-M0
微控制器,高达
128KB Flash
8 KB
SRAM
Rev. 1.2 – 2011
3
29
产品数据手册
1.
概述
LPC122x系列继续扩展了恩智浦的32½微控制器产品,定½于工业和家庭自动化领域的广泛应
用。得益于ARM
Cortex-M0的Thumb指令集,LPC12xx可以在执行典型任务时将代码密度较8½/16
½单片机提高50%。LPC122x还拥有一个为Cortex-M0设计而优化的基于ROM的除法库。它的算术
性½是基于½件的算法库的数倍,并且有高度确定的周期时间,同时也减少了Flash的代码量。
Cortex-M0的高效率,也有助于LPC122x在相同应用中实现较½的平均功耗。
LPC122x的CPU工½频率最高达45MHz。
它提供了较½容量的Flash存储器,
从32KB到128KB。
Flash存储器的擦除扇区为512字节,这可以带来许多设计上的½处,比如更½地模拟EEPROM,从
任½串行接口引导加½½程序,方便进行在现场编程(这减少了对片内RAM缓冲的要求)。
LPC122x的外设组件包括一个10½ADC、两个带有输出反馈的模拟比较器、两个UART接口、
一个SSP/SPI接口、一个带有Fast-mode
Plus功½的I C接口、一个窗式看门狗定时器、一个DMA控
制器、一个CRC模块、四个通用定时器、一个32½RTC、一个精度为1%的内部振荡器(用于波特率
产生)和多达55个通用I/O引脚。
2
2.
功½和特性
系统:
o
ARM Cortex-M0
处理器,工½频率高达45MHz(Flash一个等待状态)或30MHz(Flash零等
待状态)。LPC122x在CoreMark的CPU性½基准测试中取得了超过45分的高分(相½于
1.51/MHz)
o
ARM Cortex-M0
处理器内½有嵌套向量中断控制器
(NVIC)
o
o
o
o
o
o
o
o
串行线调试
(SWD)
系统节拍定时器
最高8kB的SRAM
最高128kB的片内Flash程序存储器
通过片内Bootloader½件来实现在系统编程
(ISP)
和在应用编程
(IAP)
基于ROM的32½整数除法例程
晶½振荡器的工½范围为1MHz~25MHz
12MHz内部RC振荡器可调节到1%的精度,可以选择用½系统时钟
振荡器提供
o
带分频器的时钟输出功½,可以映射到主振荡器时钟、IRC时钟、CPU时钟或看门狗时钟
o
实时时钟
(RTC)
存储器:
时钟产生单元:
o
PLL允许CPU无需½用高频晶½而工½在最大CPU速率下,时钟可以由系统振荡器或内部RC

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