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HC805K3GRS/D Datasheet(PDF) 6 Page - NXP Semiconductors |
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HC805K3GRS/D Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 119 page ![]() General Release Specification MC68HC805K3 — Rev. 1.0 6 2.5 User Electronically Erasable Programmable Read-Only Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 2.6 Mask Option Registers (MOR) $0012 and $0013. . . . . . . . . . .32 Section 3. Central Processing Unit Core 3.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 3.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 3.3 Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36 3.3.1 Stack Pointer (SP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 3.3.2 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . .37 Section 4. Interrupts 4.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 4.3 CPU Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 4.4 Reset Interrupt Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 4.5 Software Interrupt (SWI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 4.6 Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 4.6.1 External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . .43 4.6.2 IRQ Status/Control Register (ISCR) . . . . . . . . . . . . . . . . . .45 4.6.3 Port Interrupts (PA0–PA3). . . . . . . . . . . . . . . . . . . . . . . . . .46 4.6.4 Timer Interrupt (TIMER) . . . . . . . . . . . . . . . . . . . . . . . . . . .47 Section 5. Resets 5.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49 5.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49 5.3 External Reset (RESET). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 5.4 Internal Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 5.4.1 Power-On Reset (POR). . . . . . . . . . . . . . . . . . . . . . . . . . . .50 5.4.2 Computer Operating Properly Reset (COPR) . . . . . . . . . . .51 5.4.3 Illegal Address Reset (ILADR) . . . . . . . . . . . . . . . . . . . . . .51 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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