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MICROCONTROLLER TUTORIALS
DALLAS 80C320

DS80C320

Introduction

Chapter 1
New Instruction Speed

Chapter 2
Dual Data Pointer

Chapter 3
Watchdog

Chapter 4
Power Failure Functions

Chapter 5
Secondary Serial Port

Chapter 6
Timed Access Protection

Dallas 80C320 / DS80C320
Power Failure Reset

Power Failure Reset

The 80C320 is equipped with an automatic power failure reset. This means that if the operating voltage drops below V_rst (see chip spec sheet .) , the microcontroller will automatically enter a reset mode. The chip will remain in reset mode until normal operating voltage is restored. This reset is performed automatically requiring no special action on the part of the software or of the user.

Interesting Fact: This feature is important. A normal 8051, without such a feature, continues to run "normally" as power dips below the minimum. However, the 8051 may begin to execute bogus instructions and/or starts writing/reading incorrect values to and from memory locations. The power failure reset feature on the 80320 prevents a low power condition from causing strange and unexpected program behavior.

Click here for >>>> Dallas 80C320 - Chapter 4.2 (Power Failure Interrupt)

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