资料介绍
The AS8218 / AS8228 are highly integrated CMOS single-phase energy metering devices for fully electronic LCD meter systems. The AS8218 / AS8228 have been designed to ensure the meters full compliance with the international Standards IEC6052 and ANSI.
The AS8218 / AS8228 ICs include all the functions required for conventional 1- or 2-current anti-tamper meters. The functions include precision energy measurement, an 8-bit microcontroller unit (MCU), an on-chip Liquid Crystal Display driver (LCDD), programmable multipurpose Inputs/Outputs (MPIO), a real time clock/calendar (RTC) for complex tariff functions such as time-of-use or maximum demand billing and a Serial Peripheral Interface (SPI) for reading data from and writing data to an external non-volatile memory (EEPROM).
The AS8218 / AS8228 ICs have a dedicated energy measurement front-end, which includes an analog front-end and programmable Digital Signal Processor (DSP) from which active energy, mains voltage and mains current are provided. Reactive and apparent energy can also be calculated.
The on-chip 8-bit 8051 compatible microcontroller is freely programmable and provides user access to the various functional blocks. The dedicated Universal Asynchronous Receiver / Transmitter (UART1) in the System Control block provides access to various system functions and blocks. A second UART (UART2) is also provided, which may for example be used for debugging. The on-chip memory includes 24kByte program memory and 1kByte data memory. The meter system designer can select the size of the external EEPROM memory, from 1kByte to 32kByte (in binary steps).
An on-chip programmable watchdog timer (WDT) is available to automatically initiate a system reset if a regular ‘hold-off’ signal is not detected.
The system timing and real time clock (RTC) has a dedicated external battery supply pin (VDD_BAT), enabling the oscillator and RTC to continue during ‘power-down’. The RTC may be digitally calibrated for oscillator frequency accuracy.
The LCD Driver (LCDD) block enables the display of information provided by the microcontroller, directly to the LCD. 2 dedicated data register banks are provided to simplify programming, particularly in the case where the display data needs to be scrolled.
The programmable multi-purpose I/O pins (MPIO) may be independently configured as inputs or outputs. All the I/O pins are programmable for data direction, pull-up/pull-down resistors and drive strength (4mA/8mA). Typical functions may include LED energy consumption pulse output, energy direction and fault condition indication depending on current 1 or current 2 being active for the energy calculation, push button for display scrolling, mains isolation relay control for prepayment meters, optical interface, tamper detection etc.
An on-chip analog ground buffer (ABUF) and voltage reference (VREF) ensures that no external circuitry is required. A power-supply monitor (PSM) provides a reset, when VDD falls below a safe operating threshold. A reset pin (RES_N) is available for external system reset.
The AS8218 and AS8228 ICs are available in LQFP-64 plastic packages.
- AD8228 SPICE宏模型 2次下载
- 基于AS8228的单相电子电能表设计 26次下载
- C1165/C1205,pdf datasheet (Sin 84次下载
- ad522,pdf datasheet 13次下载
- AD8228,pdf datasheet (Instrumentation Amplifier) 22次下载
- RCA-00-A pdf datasheet 19次下载
- T1401N pdf datasheet 16次下载
- AS8218 pdf datasheet 19次下载
- A7533 pdf datasheet 39次下载
- 2N6520 pdf datasheet 9次下载
- 2N5639 pdf datasheet 8次下载
- 2N5240 pdf datasheet 10次下载
- 2N3972 pdf datasheet 7次下载
- 2N3824 pdf datasheet 18次下载
- 2n1305 pdf datasheet 11次下载
- PDF输出时出现错误提醒的解决方案 354次阅读
- Python中Excel转PDF的实现步骤 329次阅读
- 将PDF文件转换为其他格式文件使用指南 623次阅读
- 万兴PDF页眉页脚和贝茨编号使用指南 627次阅读
- 万兴PDF密码如何查看列出的权限 521次阅读
- Python怎么批量生成PDF文档 680次阅读
- 分享一个快速阅读datasheet的方法 1808次阅读
- PDF文件有哪些特点是什么? 1w次阅读
- 如何画出STM32系列单片机的原理图 2w次阅读
- 如何阅读Datasheet,是作为电子工程师的必备技能! 7608次阅读
- AD9如何简单快速的制作出原理图符号 7146次阅读
- 使用pdf解析可以用来读取PDF文件中字符串文本,图片数据 1.3w次阅读
- 读Datasheet英文原文的原因分析 4090次阅读
- adc0809中文资料下载 adc0809引脚图封装及应用电路 1.9w次阅读
- MAX232引脚图功能应用电路 MAX232中文资料PDF数据手册下载 1.4w次阅读
下载排行
本周
- 12024年工控与通信行业上游发展趋势和热点解读
- 2.61 MB | 2次下载 | 免费
- 2FS4054单节锂电池线性锂电池充电IC
- 843.62 KB | 1次下载 | 免费
- 3SN65HVD26x支持CAN FD(灵活数据速率)和冗余的Turbo CAN收发器数据表
- 1.48MB | 1次下载 | 免费
- 4TLK1221以太网收发器数据表
- 967.59KB | 1次下载 | 免费
- 5DS90UB940N-Q1 1080p FPD-link III转CSI-2解串器数据表
- 2.5MB | 1次下载 | 免费
- 6ISO26262 汽车功能安全标准第二版
- 20.79 MB | 1次下载 | 5 积分
- 7TI 10kW双向三相三级双向三相三级型 逆变器和逆变器和PFC参考设计
- 6.22 MB | 1次下载 | 免费
- 8PCB及电路设计的接地资料基础
- 0.42 MB | 1次下载 | 免费
本月
- 1对讲机原理、使用及纵图集
- 未知 | 83次下载 | 10 积分
- 2马可尼IFR 2945A综合测试仪使用手册
- 未知 | 24次下载 | 8 积分
- 3基于STM32微处理器为核心的水质监测系统
- 6.46 MB | 23次下载 | 免费
- 42.4GHz IEEE 802.15.4 和 ZigBee应用的CC253X 片上系统解决方案
- 9.00 MB | 20次下载 | 1 积分
- 5基于51单片机TEA5767收音机数码管显示设计
- 0.69 MB | 14次下载 | 10 积分
- 6摩托罗拉P200写频软件
- 未知 | 6次下载 | 6 积分
- 7使用UC3875构成的3KW实用高频开关电源设计
- 0.46 MB | 6次下载 | 1 积分
- 8奋斗STM32开发板V5原理图.pdf
- 0.15 MB | 6次下载 | 免费
总榜
- 1matlab软件下载入口
- 未知 | 935107次下载 | 10 积分
- 2开源硬件-PMP21529.1-4 开关降压/升压双向直流/直流转换器 PCB layout 设计
- 1.48MB | 420061次下载 | 10 积分
- 3Altium DXP2002下载入口
- 未知 | 233074次下载 | 10 积分
- 4电路仿真软件multisim 10.0免费下载
- 340992 | 191349次下载 | 10 积分
- 5十天学会AVR单片机与C语言视频教程 下载
- 158M | 183327次下载 | 10 积分
- 6labview8.5下载
- 未知 | 81574次下载 | 10 积分
- 7Keil工具MDK-Arm免费下载
- 0.02 MB | 73800次下载 | 10 积分
- 8LabVIEW 8.6下载
- 未知 | 65983次下载 | 10 积分
评论