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DSP56857 Datasheet(PDF) 541 Page - Freescale Semiconductor, Inc |
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DSP56857 Datasheet(HTML) 541 Page - Freescale Semiconductor, Inc |
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541 / 662 page  Application: Date: Programmer: Sheet Appendix B - Programmer’s Sheets, Rev. 4 Freescale Semiconductor B-39 19 of 24 ITCN Fast Interrupt Match Register 1 (FIM1) Bits Name Description 6 - 0 FIM1 Fast Interrupt Match 1 This value is used to declare which two IPQs will be Fast Interrupts. Fast Interrupt vector directly to a service routine based on values in the Fast Interrupt Vector Address registers without having to go to a jump table first. IRQs used as fast interrupts must be set to priority level two. Unexpected results will occur if a fast interrupt vector is set to any other priority. Fast interrupts automatically become the highest priority level two interrupts regardless of their actual location in the interrupt table prior to being declared fast interrupts. Fast Interrupt 0 has priority over Fast Interrupt 1. Fast Interrupt Match Register 1 (FIM1) $1FFF20 + $D Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Read 0 0 0 0 0 0 0 0 0 FAST INTERRUPT 1 Write Reset 000 0000 0000 0000 0 denotes Reserved Bits |
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