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NRF52820-QDAA-R Datasheet(PDF) 343 Page - Nordic Semiconductor

Part # NRF52820-QDAA-R
Description  nRF52820
PDF  437 Pages
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Manufacturer  NORDIC [Nordic Semiconductor]
Direct Link  https://www.nordicsemi.com/
Logo NORDIC - Nordic Semiconductor

NRF52820-QDAA-R Datasheet(HTML) 343 Page - Nordic Semiconductor

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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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