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AN3985 Datasheet(PDF) 92 Page - STMicroelectronics |
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AN3985 Datasheet(HTML) 92 Page - STMicroelectronics |
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92 / 105 page  Application example AN3985 92/105 Doc ID 022255 Rev 2 Figure 8. Wait for interrupt mode flowchart Mode#2: Halt Mode The Halt State is the low power consumption state of the STM8L. The main clock and all peripherals are switched off. Only an interrupt on I/O pin or reset can wake up the STM8L. In this state, only tag detection or a pressure on the reset button can wake up the system. Figure 9. Halt mode schematic MS19964V1 Start of Wait for interrupt mode End of Wait for interrupt mode Wake Up STM8L STM8L timeout = 5s ? No Yes CR95HF Detect a tag ? No Yes Test communication Ok ? Yes Wake Up CR95HF Wake Up CR95HF Wake Up STM8L Put to sleep CR95HF MS19965V1 CR95HF 1) Contactless tag into operating volume 2) A tag is detected, CR95HF sent a pulse to wake up STM8L STM8L |
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