Data Sheet — MC68HC908MR32 • MC68HC908MR16
Section 11. Power-On Reset (POR)
11.1 Introduction
This section describes the power-on reset (POR) module.
11.2 Functional Description
The POR module provides a known, stable signal to the microcontroller unit (MCU)
at power-on. This signal tracks VDD until the MCU generates a feedback signal to
indicate that it is properly initialized. At this time, the POR drives its output low.
The POR is not a brown-out detector, low-voltage detector, or glitch detector. VDD
at the POR must go completely to 0 to reset the microcontroller unit (MCU). To
detect power-loss conditions, use a low-voltage inhibit module (LVI) or other
suitable circuit.
MC68HC908MR32 • MC68HC908MR16 — Rev. 6.0
MOTOROLA Power-On Reset (POR)
Data Sheet
125
FREESCALE [ Freescale ]
