AS8218BLQS Просмотр технического описания (PDF) - austriamicrosystems AG

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AS8218BLQS

Highly Integrated Single Phase 2-Current Energy Metering Integrated Circuits with Microcontroller, RTC, Programmable Multi-Purpose I/Os and LCD Driver

austriamicrosystems AG 

Data Sheet AS8218 / AS8228

Table of Contents

1. Key Features .........................................................................................................................................1

2. General Description ...............................................................................................................................1

3. Typical Application Circuit ......................................................................................................................3

4. Pin Out..................................................................................................................................................4

5. Pin Description ......................................................................................................................................4

6. Electrical Characteristics........................................................................................................................9

6.1 Absolute Maximum Ratings (Non-Operating) ......................................................................................9

6.2 Operating Conditions ........................................................................................................................9

6.3 DC/AC Characteristics for Digital Inputs and Outputs........................................................................ 10

6.4 Electrical System Specification ........................................................................................................ 11

7. Performance Graphs ............................................................................................................................ 12

8. Detailed Functional Description ............................................................................................................ 14

8.1 Energy Measurement Front End (Including DSP) .............................................................................. 16

8.2 LCD Driver (LCDD) ......................................................................................................................... 48

8.3 Programmable Multi-Purpose I/Os (MPIO)........................................................................................ 54

8.4 Serial Peripheral Interface (SPI) ...................................................................................................... 64

8.5 External EEPROM Requirements ..................................................................................................... 70

8.6 8051 Microcontroller (MCU)............................................................................................................. 77

8.7 System Control (SCT) ..................................................................................................................... 98

8.8 Serial Interface – UART1............................................................................................................... 105

9. Circuit Diagram.................................................................................................................................. 114

10. Parts List........................................................................................................................................... 115

11. Packaging ......................................................................................................................................... 117

12. Product Ordering Guide ..................................................................................................................... 117

13. Collection of Formulae ....................................................................................................................... 118

14. Terminology ...................................................................................................................................... 121

15. Revision ............................................................................................................................................ 122

16. Copyright .......................................................................................................................................... 122

17. Disclaimer ......................................................................................................................................... 122

18. Contact ............................................................................................................................................. 123

Revision 3.0, 31-May-06

Page 8 of 123

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