MC68HC08AZ32A Datasheet, PDF (173/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 13. Low Voltage Inhibit (LVI)
13.1 Contents
13.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
13.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
13.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
13.4.1 Polled LVI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
13.4.2 Forced Reset Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 175
13.4.3 False Reset Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . 176
13.5 LVI Status Register (LVISR). . . . . . . . . . . . . . . . . . . . . . . . . 176
13.6 LVI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.7.1 WAIT Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
13.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
13.2 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.
13.3 Features
Features of the LVI module include the following:
• Programmable LVI reset
• Programmable power consumption
• Digital filtering of VDD pin level
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Low Voltage Inhibit (LVI)
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Technical Data
173