Rainbow-electronics AT89C5122 Manual de usuario descargar pdf (Pagina 212)

212

4202E–SCR–06/06

AT8xC5122/23

Registers........................................................................................................... 162

Interrupt Sources and Vectors.......................................................................... 171

Microcontroller Reset ....................................................................... 172

Introduction....................................................................................................... 172

Power On Reset (POR).................................................................................... 173

Power Fail Detector (PFD)................................................................................ 173

Reset pin........................................................................................................... 175

Watchdog Timer ............................................................................................... 177

Power Management .......................................................................... 180

Idle Mode.......................................................................................................... 180

Power Down Mode ........................................................................................... 180

Reduced EMI Mode.......................................................................................... 181

USB Interface ................................................................................................... 182

Smart Card Interface ........................................................................................ 183

Keyboard Interface ........................................................................................... 184

Watchdog Timer during Power-down and Idle Mode........................................ 184

Registers........................................................................................................... 185

Electrical Characteristics ................................................................. 186

Absolute Maximum Ratings ..............................................................................186

DC Parameters .................................................................................................186

LED’s ................................................................................................................188

Smart Card Interface ........................................................................................ 189

USB Interface ................................................................................................... 192

AC Parameters ................................................................................................. 193

Float Waveforms............................................................................................... 199

Packaging Information ..................................................................... 201

Ordering Information......................................................................................... 201

Mechanical Dimensions.................................................................................... 203

Datasheet Revision History ............................................................. 209

Changes from 4202A to 4202B ........................................................................209

Changes from 4202B to 4202C ........................................................................209

Changes from 4202C to 4202D ........................................................................209

Changes from 4202D to 4202E ........................................................................209

Table of Contents ............................................................................. 210

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Rainbow-electronics AT89C5122 Manual de usuario Pagina 212