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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST10R272LT1 데이터시트(PDF) 24 Page - STMicroelectronics |
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ST10R272LT1 데이터시트(HTML) 24 Page - STMicroelectronics |
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24 / 77 page  24/77 ST10R272L - INTERRUPT AND TRAP FUNCTIONS 6.2 Hardware Traps Exceptions or error conditions that arise during run-time are called Hardware Traps. Hardware traps cause immediate non-maskable system reaction similar to a standard interrupt service (branching to a dedicated vector table location). The occurrence of a hardware trap is additionally signified by an individual bit in the trap flag register (TFR). Except when another higher prioritized trap service is in progress, a hardware trap will interrupt any actual program execution. In turn, hardware trap services can not normally be interrupted by standard or PEC interrupts. The following table shows all of the possible exceptions or error conditions that can arise during run-time: Exception Condition Trap Flag Trap Vector Vector Location Trap Number Trap Priority Reset Functions: Hardware Reset RESET 00’0000h 00h III Software Reset RESET 00’0000h 00h III Watchdog Timer Overflow RESET 00’0000h 00h III Class A Hardware Traps: Non-Maskable Interrupt NMI NMITRAP 00’0008h 02h II Stack Overflow STKOF STOTRAP 00’0010h 04h II Stack Underflow STKUF STUTRAP 00’0018h 06h II Class B Hardware Traps: Undefined opcode UNDOPC BTRAP 00’0028h 0Ah I Protected instruction fault PRTFLT BTRAP 00’0028h 0Ah I Illegal word operand access ILLOPA BTRAP 00’0028h 0Ah I Illegal instruction access ILLINA BTRAP 00’0028h 0Ah I Illegal external bus access ILLBUS BTRAP 00’0028h 0Ah I MAC trap MACTRP BTRAP 00’0028h 0Ah I Reserved [2Ch – 3Ch][0Bh – 0Fh] Software Traps TRAP Instruction Any [00’0000h – 00’01FCh] steps of 4h Any [00h – 7Fh] Current CPU Priority Table 6 Exceptions or error conditions 1 |
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