Dallas Semiconductor

DS1232 - Micromonitor Chip

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Features Monitors power supply for safe operating levels Monitors software execution with watchdog timer Monitors external pushbutton reset Provides automatic, orderly shutdown under specified conditions Initiates and holds processor reset until levels are unsafe Provides active high and low resets, user-set for 5% or 10% Automatically restarts processor on power-up Pauses restart until system stabilizes

Pin Description Pin Number Description 1 PBRST - Pushbutton Reset 2 TD - Time Delay Set 3 TOL - Selects 5% or 10% Vcc Detect 4 GND - Ground 5 RST - Reset Output (Active High) 6 RST - Reset Output (Active Low) 7 ST - Strobe Input 8 Vcc - +5V Power

Dimensional Drawing Dimensional Drawing

Technical Data Data Sheet Dallas Semiconductor - Data Sheet for DS1232 Application Notes Advantages of Using a MicroMonitor and a Simple Application Demonstrating the Use of a DS1232