MC68HC901 Datasheet, PDF (7/73 Pages) Motorola, Inc – Multi-Function Peripheral

TABLE OF CONTENTS (Continued)
Paragraph
Number
Title
Page
Number
3.1
3.1.1
3.1.2
3.2
3.3
Section 3
Bus Operation
Data Transfer Operations ......................................................................... 3-1
Read Cycle .......................................................................................... 3-1
Write Cycle .......................................................................................... 3-2
Interrupt Acknowledge Operation ............................................................. 3-2
Reset Operation ....................................................................................... 3-3
4.1
4.1.1
4.1.2
4.1.3
4.2
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.4
4.4.1
4.4.2
4.4.3
Section 4
Interrupt Structure
Interrupt Processing ................................................................................. 4-1
Interrupt Channel Prioritization ............................................................ 4-1
Interrupt Vector Number ...................................................................... 4-1
Vector Register (VR) ........................................................................... 4-2
Daisy-Chaining MFPs ............................................................................... 4-3
Interrupt Control Registers ....................................................................... 4-4
Interrupt Enable Registers (IERA, IERB) ............................................ 4-4
Interrupt Pending Registers (IPRA, IPRB) .......................................... 4-6
Interrupt Mask Registers (IMRA, IMRB) .............................................. 4-8
Interrupt In-Service Registers (ISRA, ISRB) ..................................... 4-10
Nesting MFP Interrupts ........................................................................... 4-11
Selecting the End-Of-Interrupt Mode ................................................. 4-11
Automatic End-Of-Interrupt Mode ..................................................... 4-12
Software End-Of-Interrupt Mode ....................................................... 4-12
5.1
5.1.1
5.1.2
5.1.3
Section 5
General Purpose Input/Output Port
GPIP Control Registers ............................................................................ 5-1
General Purpose I/O Data Register (GPDR) ....................................... 5-1
Active Edge Register (AER) ................................................................ 5-1
Data Direction Register (DDR) ............................................................ 5-2
6.1
6.1.1
6.1.2
6.1.3
6.2
Section 6
Timers
Operation Modes ...................................................................................... 6-1
Delay Mode Operation ........................................................................ 6-1
Pulse Width Measurement Operation ................................................. 6-2
Event Count Mode Operation .............................................................. 6-3
Timer Registers ........................................................................................ 6-4
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MC68HC901 USER’S MANUAL
MOTOROLA