MC68HC908GP20 Datasheet, PDF (199/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Advance Information — MC68HC908GP20
Section 14. Low-Voltage Inhibit (LVI)
14.1 Contents
14.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
14.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200
14.4.1 Polled LVI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
14.4.2 Forced Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 202
14.4.3 Voltage Hysteresis Protection . . . . . . . . . . . . . . . . . . . . . . 202
14.4.4 LVI Trip Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
14.5 LVI Status Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
14.6 LVI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
14.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
14.7.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
14.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
14.2 Introduction
This section describes the low-voltage inhibit (LVI) module, which
monitors the voltage on the V_DD pin and can force a reset when the V_DD
voltage falls below the LVI trip falling voltage, V_TRIPF.
14.3 Features
Features of the LVI module include:
• Programmable LVI reset
• Selectable LVI trip voltage
• Programmable stop mode operation
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
199