MC68HC912DG128A MOTOROLA [Motorola, Inc], MC68HC912DG128A Datasheet - Page 115
MC68HC912DG128A
Manufacturer Part Number
MC68HC912DG128A
Description
microcontroller unit 16BIT DEVICE
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC912DG128A.pdf
(404 pages)
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Contents
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Exception Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Maskable interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Latching of Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Interrupt Control and Priority Registers. . . . . . . . . . . . . . . . . . . . . . . 119
Interrupt test registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Effects of Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Register Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
CPU12 exceptions include resets and interrupts. Each exception has an
associated 16-bit vector, which points to the memory location where the
routine that handles the exception is located. Vectors are stored in the
upper 128 bytes of the standard 64K byte address map.
The six highest vector addresses are used for resets and non-maskable
interrupt sources. The remainder of the vectors are used for maskable
interrupts, and all must be initialized to point to the address of the
appropriate service routine.
Resets and Interrupts
Resets and Interrupts
Resets and Interrupts
MC68HC912DT128A Rev 2.0
115
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