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AM8530 Datasheet(PDF) 40 Page - Advanced Micro Devices |
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AM8530 Datasheet(HTML) 40 Page - Advanced Micro Devices |
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40 / 194 page  I/O Programming Functional Description AMD 3–9 Start Condition Exits ? Interrupt Interrupt Enable (IEx = 1) ? Specific Interrupt Pending Set (IP = 1) Interrupt Enables (MIE = 1) ? Master Peripheral Enable Pin Active (IEI = H) IS Peripheral Requests Interrupt (INT = L) CPU Initiates Status Decode (INTACK = L) IEI/IEO Daisy Chain Settles (Wait for DS) Priority Peripheral Disabled Unit? Has Higher Unit Selected for CPU Service (IUS = 1) Routine Complete ? Service (Option) Check Other Internal IP, Bits, Still Pending (IP = 1) ? Interrupt CPU Services Higher Priority Peripheral Service Complete ? Priority Yes No No Yes Yes No Yes No No Yes Yes ? (IEI = L) No No Yes Yes No Reset IUS and EXIT Figure 3–5. Interrupt Protocol |
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