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M68HC128 Datasheet(PDF) 8 Page - Motorola, Inc

Part # M68HC128
Description  Microcontrollers
Download  362 Pages
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

M68HC128 Datasheet(HTML) 8 Page - Motorola, Inc

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Table of Contents
Data Sheet
M68HC12B Family — Rev. 9.0
8
Table of Contents
MOTOROLA
Section 2. Register Block
2.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
2.2
Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Section 3. Central Processor Unit (CPU)
3.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.2
Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.3
CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.3.1
Accumulators A and B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.3.2
Accumulator D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.3.3
Index Registers X and Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.3.4
Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.3.5
Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.3.6
Condition Code Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.4
Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.5
Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3.6
Indexed Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
3.7
Opcodes and Operands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Section 4. Resets and Interrupts
4.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.2
Exception Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.3
Maskable Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.4
Latching of Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.5
Interrupt Control and Priority Registers . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.5.1
Interrupt Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.5.2
Highest Priority I Interrupt Register. . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.6
Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.6.1
Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.6.2
External Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.6.3
Computer Operating Properly (COP) Reset . . . . . . . . . . . . . . . . . . . 74
4.6.4
Clock Monitor Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7
Effects of Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.1
Operating Mode and Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.2
Clock and Watchdog Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.3
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.4
Parallel Input/Output (I/O). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.7.5
Central Processing Unit (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.7.6
Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.7.7
Other Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.8
Interrupt Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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