mc68hc05p1a Freescale Semiconductor, Inc, mc68hc05p1a Datasheet - Page 45

• Manufacturer Part Number: mc68hc05p1a
• Description: General Release Specification
• Manufacturer: Freescale Semiconductor, Inc

General Release Specification — MC68HC05P1A
5.1 Contents
5.2 Introduction
MC68HC05P1A
—
Rev. 3.0
5.2
5.3
5.4
5.4.1
5.4.2
The MCU can be reset from three sources: one external input and two
internal reset conditions. The RESET pin is an input with a Schmitt
trigger, as shown in
be reset by the RST signal, which is the logical OR of internal reset
functions and is clocked by PH2.
RESET
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ADDRESS
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
External Reset (RESET). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Internal Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
DD
Power-On Reset (POR). . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Computer Operating Properly (COP) Reset . . . . . . . . . . . .46
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POWER-ON
(COPR)
RESET
(POR)
COP
Figure 5-1. Reset Block Diagram
Figure
Resets
5-1. The CPU and all peripheral modules will
Section 5. Resets
General Release Specification
RESET
LATCH
PH2
RST
TO CPU AND
PERIPHERALS