MC68331 View Datasheet(PDF) - Motorola => Freescale
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MC68331 Datasheet PDF : 254 Pages
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TABLE OF CONTENTS
(Continued)
Title
Page
4.5.6.1
Slave (Factory Test) Mode Arbitration ......................................... 4-35
4.5.6.2
Show Cycles ................................................................................ 4-35
4.6 Reset ............................................................................................................ 4-36
4.6.1
Reset Exception Processing ................................................................ 4-36
4.6.2
Reset Control Logic .............................................................................. 4-37
4.6.3
Reset Mode Selection .......................................................................... 4-37
4.6.3.1
Data Bus Mode Selection ............................................................. 4-38
4.6.3.2
Clock Mode Selection .................................................................. 4-40
4.6.3.3
Breakpoint Mode Selection .......................................................... 4-40
4.6.4
MCU Module Pin Function During Reset ............................................. 4-40
4.6.5
Pin State During Reset ......................................................................... 4-41
4.6.5.1
Reset States of SIM Pins ............................................................. 4-41
4.6.5.2
Reset States of Pins Assigned to Other MCU Modules ............... 4-42
4.6.6
Reset Timing ........................................................................................ 4-42
4.6.7
Power-On Reset ................................................................................... 4-43
4.6.8
Reset Processing Summary ................................................................. 4-44
4.6.9
Reset Status Register .......................................................................... 4-45
4.7 Interrupts ...................................................................................................... 4-45
4.7.1
Interrupt Exception Processing ............................................................ 4-45
4.7.2
Interrupt Priority and Recognition ......................................................... 4-45
4.7.3
Interrupt Acknowledge and Arbitration ................................................. 4-46
4.7.4
Interrupt Processing Summary ............................................................. 4-47
4.7.5
Interrupt Acknowledge Bus Cycles ....................................................... 4-48
4.8 Chip Selects ................................................................................................. 4-48
4.8.1
Chip-Select Registers ........................................................................... 4-50
4.8.1.1
Chip-Select Pin Assignment Registers ........................................ 4-51
4.8.1.2
Chip-Select Base Address Registers ........................................... 4-52
4.8.1.3
Chip-Select Option Registers ....................................................... 4-52
4.8.1.4
PORTC Data Register .................................................................. 4-54
4.8.2
Chip-Select Operation .......................................................................... 4-54
4.8.3
Using Chip-Select Signals for Interrupt Acknowledge .......................... 4-54
4.8.4
Chip-Select Reset Operation ................................................................ 4-55
4.9 Parallel Input/Output Ports ........................................................................... 4-57
4.9.1
Pin Assignment Registers .................................................................... 4-57
4.9.2
Data Direction Registers ...................................................................... 4-57
4.9.3
Data Registers ...................................................................................... 4-57
4.10 Factory Test ................................................................................................. 4-57
SECTION 5 CENTRAL PROCESSING UNIT
5.1 General ........................................................................................................... 5-1
5.2 CPU32 Registers ............................................................................................ 5-2
MC68331
USER’S MANUAL
MOTOROLA
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