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