Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual page 563

Bit Name
1
22 ERRSDMA
When set, DMA requests will be cleared on framing and parity errors (asynchronous mode only).
Value
0
1
21 BIT8DV
The default value of the 9th bit. If 9-bit frames are used, and an 8-bit write operation is done, leaving the 9th bit unspecified,
the 9th bit is set to the value of BIT8DV.
20 SKIPPERRF
When set, the receiver discards frames with parity errors (asynchronous mode only). The PERR interrupt flag is still set.
19 SCRETRANS
When in SmartCard mode, a NACK'ed frame will be kept in the shift register and retransmitted if the transmitter is still ena-
bled.
18 SCMODE
Use this bit to enable or disable SmartCard mode.
17 AUTOTRI
When enabled, TXTRI is set by hardware whenever the transmitter is idle, and TXTRI is cleared by hardware when trans-
mission starts.
Value
0
1
16 AUTOCS
When enabled, the output on USn_CS will be activated one baud-period before transmission starts, and deactivated when
transmission ends.
15 CSINV
Default value is active low. This affects both the selection of external slaves, as well as the selection of the microcontroller
as a slave.
Value
0
1
14 TXINV
The output from the USART transmitter can optionally be inverted by setting this bit.
Value
0
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USART - Universal Synchronous Asynchronous Receiver/Transmitter
Reset Access Description
Framing and parity errors disable the receiver
0 RW Halt DMA on Error
Description
Framing and parity errors have no effect on DMA requests from the
USART
DMA requests from the USART are blocked while the PERR or FERR
interrupt flags are set
0 RW Bit 8 Default Value
0 RW Skip Parity Error Frames
0 RW SmartCard Retransmit
0 RW SmartCard Mode
0 RW Automatic TX Tristate
Description
The output on U(S)n_TX when the transmitter is idle is defined by
TXINV
U(S)n_TX is tristated whenever the transmitter is idle
0 RW Automatic Chip Select
0 RW Chip Select Invert
Description
Chip select is active low
Chip select is active high
0 RW Transmitter Output Invert
Description
Output from the transmitter is passed unchanged to U(S)n_TX
Reference Manual
Rev. 1.1 | 563