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NRF52820-QDAA-R Datasheet(PDF) 343 Page - Nordic Semiconductor |
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NRF52820-QDAA-R Datasheet(HTML) 343 Page - Nordic Semiconductor |
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343 / 437 page ![]() Peripherals When the SUSPEND task is triggered, the UART receiver will behave in the same way as it does when the STOPRX task is triggered. 6.24.7 Error conditions An ERROR event, in the form of a framing error, will be generated if a valid stop bit is not detected in a frame. Another ERROR event, in the form of a break condition, will be generated if the RXD line is held active low for longer than the length of a data frame. Effectively, a framing error is always generated before a break condition occurs. 6.24.8 Using the UART without flow control If flow control is not enabled, the interface will behave as if the CTS and RTS lines are kept active all the time. 6.24.9 Parity and stop bit configuration Automatic even parity generation for both transmission and reception can be configured using the register CONFIG on page 351. If odd parity is desired, it can be configured using the register CONFIG on page 351. See the register description for details. The amount of stop bits can also be configured through the register CONFIG on page 351. 6.24.10 Registers Base address Peripheral Instance Description Configuration 0x40002000 UART UART0 Universal asynchronous receiver/ transmitter Deprecated Table 103: Instances Register Offset Description TASKS_STARTRX 0x000 Start UART receiver TASKS_STOPRX 0x004 Stop UART receiver TASKS_STARTTX 0x008 Start UART transmitter TASKS_STOPTX 0x00C Stop UART transmitter TASKS_SUSPEND 0x01C Suspend UART EVENTS_CTS 0x100 CTS is activated (set low). Clear To Send. EVENTS_NCTS 0x104 CTS is deactivated (set high). Not Clear To Send. EVENTS_RXDRDY 0x108 Data received in RXD EVENTS_TXDRDY 0x11C Data sent from TXD EVENTS_ERROR 0x124 Error detected EVENTS_RXTO 0x144 Receiver timeout SHORTS 0x200 Shortcuts between local events and tasks INTENSET 0x304 Enable interrupt INTENCLR 0x308 Disable interrupt ERRORSRC 0x480 Error source ENABLE 0x500 Enable UART PSEL.RTS 0x508 Pin select for RTS PSEL.TXD 0x50C Pin select for TXD PSEL.CTS 0x510 Pin select for CTS PSEL.RXD 0x514 Pin select for RXD RXD 0x518 RXD register TXD 0x51C TXD register BAUDRATE 0x524 Baud rate. Accuracy depends on the HFCLK source selected. 4463_156 v1.0 343 |
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