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ST7MC1K2-Auto 数据表(PDF) 362 Page - STMicroelectronics |
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ST7MC1K2-Auto 数据表(HTML) 362 Page - STMicroelectronics |
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362 / 371 page  Obsolete Product(s) - Obsolete Product(s) Known limitations ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto 362/371 Concurrent interrupt context The symptom does not occur when the interrupts are handled normally, that is, when: ● The interrupt request is cleared (flag reset or interrupt mask) within its own interrupt routine ● The interrupt request is cleared (flag reset or interrupt mask) within any interrupt routine ● The interrupt request is cleared (flag reset or interrupt mask) in any part of the code while this interrupt is disabled If these conditions are not met, the symptom can be avoided by implementing the following sequence: Perform SIM and RIM operation before and after resetting an active interrupt request Example: SIM Reset flag or interrupt mask RIM Nested interrupt context The symptom does not occur when the interrupts are handled normally, that is, when: ● The interrupt request is cleared (flag reset or interrupt mask) within its own interrupt routine. ● The interrupt request is cleared (flag reset or interrupt mask) within any interrupt routine with higher or identical priority level. ● The interrupt request is cleared (flag reset or interrupt mask) in any part of the code while this interrupt is disabled. If these conditions are not met, the symptom can be avoided by implementing the following sequence: Push CC SIM Reset flag or interrupt mask Pop CC 15.3 TIMD set simultaneously with OC interrupt If the 16-bit timer is disabled at the same time as the output compare event occurs then the output compare flag gets locked and cannot be cleared before the timer is enabled again. 15.3.1 Impact on the application If the output compare interrupt is enabled, then the output compare flag cannot be cleared in the timer interrupt routine. Consequently the interrupt service routine is called repeatedly and the application gets stuck which causes the watchdog reset if enabled by the application. Obsolete Product(s) - Obsolete Product(s) |
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