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NRF52811-QCAA-R7 Datasheet(PDF) 365 Page - Nordic Semiconductor |
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NRF52811-QCAA-R7 Datasheet(HTML) 365 Page - Nordic Semiconductor |
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365 / 444 page ![]() Peripherals / STOPPED Unprepare TX, Unprepare RX TX entry / Unprepare TX entry / TXSTARTED IDLE PREPARETX RX entry / Unprepare RX entry / RXSTARTED [ READ && (TX prepared) ] [ WRITE && (RX prepared) ] STOP Stop sequence PREPARERX Restart sequence ENABLE Figure 139: TWI slave state machine Symbol Type Description ENABLE Register The TWI slave has been enabled via the ENABLE register PREPARETX Task The TASKS_PREPARETX task has been triggered STOP Task The TASKS_STOP task has been triggered PREPARERX Task The TASKS_PREPARERX task has been triggered STOPPED Event The EVENTS_STOPPED event was generated RXSTARTED Event The EVENTS_RXSTARTED event was generated TXSTARTED Event The EVENTS_TXSTARTED event was generated TX prepared Internal Internal flag indicating that a TASKS_PREPARETX task has been triggered. This flag is not visible to the user. RX prepared Internal Internal flag indicating that a TASKS_PREPARERX task has been triggered. This flag is not visible to the user. Unprepare TX Internal Clears the internal 'TX prepared' flag until next TASKS_PREPARETX task. Unprepare RX Internal Clears the internal 'RX prepared' flag until next TASKS_PREPARERX task. Stop sequence TWI protocol A TWI stop sequence was detected Restart sequence TWI protocol A TWI restart sequence was detected Table 107: TWI slave state machine symbols The TWI slave supports clock stretching performed by the master. The TWI slave operates in a low power mode while waiting for a TWI master to initiate a transfer. As long as the TWI slave is not addressed, it will remain in this low power mode. 4454_140 v1.0 365 |
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