Integrated circuit including interrupt controller with shared preamble execution and global-disable control bit
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United States of America Patent
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Jul 12, 2005
Grant Date -
Feb 7, 2002
app pub date -
Mar 8, 2001
filing date -
Jun 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A interrupt controller includes specialized interfaces and controls for ARM7TDMI-type microcontroller cores. Such sends interrupt vectors and IRQ or FIQ interrupt requests to the processor depending on particular interrupts received. Wherein, THUMB program execution is more economical with program code space, and an interrupt service routine preamble is coded in ARM program code to cause a switch to THUMB program execution. The interrupt service routine preamble is shared amongst all the interrupt service routines to further economize on program code space.
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