mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 133
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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Technical Data — MC68HC912DG128
9.1 Contents
9.2 Introduction
MC68HC912DG128 — Rev 3.0
MOTOROLA
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
9.10
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.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Maskable interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Latching of Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Interrupt Control and Priority Registers . . . . . . . . . . . . . . . . . 135
Interrupt test registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Effects of Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Register Stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Go to: www.freescale.com
Resets and Interrupts
Section 9. Resets and Interrupts
Technical Data
133
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