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Contents 1 INTRODUCTION ....................................................................................................................................... 3 APPLICATIONS .............................................................................................................................................. 4 FEATURES .................................................................................................................................................... 4 CONSTRUCTION OF THE MODULE ............................................................................................... 5 2 BLOCK DIAGRAM .......................................................................................................................................... 5 MODULE PIN-OUT ......................................................................................................................................... 6 ATMEGA128 MICROCONTROLLER ............................................................................................................. 13 ETHERNET CONTROLLER LAN91C111..................................................................................................... 13 MEMORY CONTROLLER .............................................................................................................................. 14 RAM MEMORY ........................................................................................................................................... 19 DATAFLASH MEMORY................................................................................................................................. 19 REAL-TIME CLOCK ...................................................................................................................................... 20 SUPPLY OF POWER .................................................................................................................................... 20 RESET CIRCUIT ........................................................................................................................................ 20 LED DIODES ............................................................................................................................................... 21 CONNECTION OF THE MODULE WITH THE EXTERNAL WORLD ....................................... 22 3 CONNECTION TO THE ETHERNET NETWORK ............................................................................................. 22 USB INTERFACE ........................................................................................................................................ 22 RS-232 INTERFACE ................................................................................................................................... 23 RS-485 INTERFACE ................................................................................................................................... 23 RADIO LINK ................................................................................................................................................. 24 LCD DISPLAY ............................................................................................................................................. 24 EXTERNAL PERIPHERALS ON THE SYSTEM BUS ......................................................................................... 25 PROGRAMMING THE MODULE..................................................................................................... 27 4 ISP CONNECTOR ........................................................................................................................................ 27 JTAG CONNECTOR .................................................................................................................................... 29 5 AN APPLICATION EXAMPLE ......................................................................................................... 30 6 EVALUATION BOARD...................................................................................................................... 31 7 SPECIFICATIONS.............................................................................................................................. 31 8 TECHNICAL ASSISTANCE ............................................................................................................. 32 9 GUARANTEE ...................................................................................................................................... 32 10 ASSEMBLY DRAWINGS.............................................................................................................. 32 11 DIMENSIONS .................................................................................................................................. 34 12 SCHEMATICS ................................................................................................................................. 34
