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ST10F280 Datasheet(PDF) 72 Page - STMicroelectronics |
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ST10F280 Datasheet(HTML) 72 Page - STMicroelectronics |
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72 / 239 page  Interrupt system ST10F280 72/239 Doc ID 8673 Rev. 3 Hardware traps are exceptions or error conditions that arise during run-time. They 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 other program execution. Hardware trap services cannot not be interrupted by standard interrupt or by PEC interrupts. 8.3 Interrupt Control Registers All interrupt control registers are identically organized. The lower 8 bit of an interrupt control register contain the complete interrupt status information of the associated source, which is required during one round of prioritization, the upper 8 bit of the respective register are reserved. All interrupt control registers are bit-addressable and all bit can be read or written via software. This allows each interrupt source to be programmed or modified with just one instruction. When accessing interrupt control registers through instructions which operate on Word data types, their upper 8 bit (15...8) will return zeros, when read, and will discard written data. The layout of the Interrupt Control registers shown below applies to each xxIC register, where xx stands for the mnemonic for the respective source. ASC0 Receive S0RIR S0RIE S0RINT 00’00ACh 2Bh ASC0 Error S0EIR S0EIE S0EINT 00’00B0h 2Ch SSC Transmit SCTIR SCTIE SCTINT 00’00B4h 2Dh SSC Receive SCRIR SCRIE SCRINT 00’00B8h 2Eh SSC Error SCEIR SCEIE SCEINT 00’00BCh 2Fh PWM Channel 0...3 PWMIR PWMIE PWMINT 00’00FCh 3Fh CAN1 Interface XP0IR XP0IE XP0INT 00’0100h 40h CAN2 Interface XP1IR XP1IE XP1INT 00’0104h 41h XPWM XP2IR XP2IE XP2INT 00’0108h 42h PLL Unlock/OWD XP3IR XP3IE XP3INT 00’010Ch 43h Table 8. Interrupt sources (continued) Source of Interrupt or PEC service request Request flag Enable flag Interrupt vector Vector location Trap number |
Similar Part No. - ST10F280_12 |
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