MC68HC08AZ60A Datasheet, PDF (195/480 Pages) Motorola, Inc – Microcontrollers

Advance Information — MC68HC08AZ60A
Section 14. Low Voltage Inhibit (LVI)
14.1 Contents
14.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
14.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
14.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .196
14.4.1 Polled LVI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
14.4.2 Forced Reset Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 197
14.4.3 False Reset Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . 198
14.5 LVI Status Register (LVISR). . . . . . . . . . . . . . . . . . . . . . . . . 198
14.6 LVI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
14.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
14.7.1 WAIT Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
14.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
14.2 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.
Note that the LVI feature is intended to provide the safe shutdown
of the microcontroller and thus protection of related circuitry prior
to any application V_DD voltage collapsing completely to an unsafe
level. Is is not intended that users operate the microcontroller at
lower than the specified operating voltage, V_DD.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Low Voltage Inhibit (LVI)
Advance Information
195