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ST20C2 数据表(PDF) 45 Page - STMicroelectronics |
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ST20C2 数据表(HTML) 45 Page - STMicroelectronics |
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45 / 212 page  causeerror 45/212 ® causeerror cause error Code: 62 FF Description: Take a trap with the trap type set to the value in Areg. Only one bit in Areg should be set; the position of the bit indicates the trap to be signalled. When the trap is taken the causeerror bit in the status register is set to indicate a user generated trap. In the case of a scheduler trap being set then the bottom bit of Breg is used to determine the priority of the scheduler trap. In addition when the scheduler trap is trapping a process scheduling operation (e.g. the run trap) the Breg is interpreted as the process descriptor to be scheduled. Definition: if (Areg=2i) and ( trap type i is enabled) { set causeerror bit in Status cause trap type i } else Undefined effect Error signals: The causeerror bit is set and the indicated trap signalled if enabled. Comments: Secondary instruction. Sets traps independently of trap enables state. See also: tret sttraph ldtrap |
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