MC908AB32CFUE Datasheet, PDF (359/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

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
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
Low-Voltage Inhibit (LVI)
Technical Data
359