MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 75

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MC68HC908QY2

Manufacturer Part Number
MC68HC908QY2
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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7.1 Contents
MOTOROLA
Data Sheet — MC68HC908QY4
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
7.2
7.3
7.4
7.4.1
7.4.2
7.4.3
7.5
7.5.1
7.5.2
7.5.2.1
7.5.2.2
7.5.2.3
7.5.2.4
7.5.2.5
7.6
7.6.1
7.6.2
7.6.3
7.7
7.7.1
7.7.1.1
7.7.1.2
7.7.2
7.7.2.1
7.7.2.2
7.7.2.3
7.7.3
7.7.4
Section 7. System Integration Module (SIM)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
RST and IRQ Pins Initialization . . . . . . . . . . . . . . . . . . . . . . . .79
SIM Bus Clock Control and Generation . . . . . . . . . . . . . . . . . . 79
Reset and System Initialization. . . . . . . . . . . . . . . . . . . . . . . . . 80
SIM Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Exception Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Bus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Clock Start-Up from POR . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Clocks in Stop Mode and Wait Mode . . . . . . . . . . . . . . . . . . 80
External Pin Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Active Resets from Internal Sources . . . . . . . . . . . . . . . . . . 81
SIM Counter During Power-On Reset . . . . . . . . . . . . . . . . . 85
SIM Counter During Stop Mode Recovery . . . . . . . . . . . . . . 85
SIM Counter and Reset States. . . . . . . . . . . . . . . . . . . . . . . 85
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Interrupt Status Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
System Integration Module (SIM)
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Computer Operating Properly (COP) Reset. . . . . . . . . . . 83
Illegal Opcode Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Illegal Address Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Low-Voltage Inhibit (LVI) Reset . . . . . . . . . . . . . . . . . . . .84
Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
SWI Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Interrupt Status Register 1 . . . . . . . . . . . . . . . . . . . . . . . .91
Interrupt Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . .91
Interrupt Status Register 3 . . . . . . . . . . . . . . . . . . . . . . . .92
75

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