Motorola MC68HC908AB32 - Section 20. Computer Operating Properly (COP); Contents; Features; Introduction

MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA Low-Voltage Inhibit (LVI) 359
Technical Data — MC68HC908AB32
Section 21. Low-Voltage Inhibit (LVI)
21.1 Contents
21.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .359
21.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .359
21.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360
21.4.1 Polled LVI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361
21.4.2 Forced Reset Operation. . . . . . . . . . . . . . . . . . . . . . . . . . .361
21.4.3 False Reset Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . .361
21.5 LVI Status Register (LVISR). . . . . . . . . . . . . . . . . . . . . . . . . .362
21.6 LVI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .362
21.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
21.7.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
21.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
21.2 Introduction
This section describes the low-voltage inhibit module, which monitors
the voltage on the V
DD
pin and can force a reset when the V
DD
voltage
falls to the LVI trip voltage.
21.3 Features
Features of the LVI module include the following:
• Programmable LVI reset
• Programmable LVI module power
• Programmable stop mode operation