MC68HC05E5 Datasheet, PDF (39/140 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification — MC68HC05E5
Section 5. Resets
5.1 Contents
5.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
5.3 External Reset (RESET). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
5.4 Internal Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.5 Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.6 Computer Operating Properly Reset (COPR). . . . . . . . . . . . . .43
5.6.1 Resetting the COP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5.6.2 COP During Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5.6.3 COP During Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5.6.4 COP Watchdog Timer Considerations . . . . . . . . . . . . . . . .44
5.7 Illegal Address Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
5.2 Introduction
The MCU can be reset from five sources: one external input and four
internal restart conditions. The RESET pin is an input with a Schmitt
trigger as shown in Figure 5-1. All the internal peripheral modules will be
reset by the internal reset signal (RST). Refer to Figure 5-2 for reset
timing detail.
MC68HC05E5 — Rev. 1.0
General Release Specification
Resets
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