Sbuf1: Uart1 Serial Port Data Buffer - Silicon Laboratories EFM8 Series Reference Manual

Bit Name
1
0 SBL
Value
0
1

20.4.3 SBUF1: UART1 Serial Port Data Buffer

Bit 7
Name
Access
Reset
SFR Page = 0x0, 0x20; SFR Address: 0x99
Bit Name
7:0 SBUF1
This SFR accesses the transmit and receive FIFOs. When data is written to SBUF1 and TXNF is 1, the data is placed into
the transmit FIFO and is held for serial transmission. Any data in the TX FIFO will initiate a transmission. Writing to SBUF1
while TXNF is 0 will over-write the most recent byte in the TX FIFO.
A read of SBUF1 returns the oldest byte in the RX FIFO. Reading SBUF1 when RI is 0 will continue to return the last avail-
able data byte in the RX FIFO.
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Reset Access Description
ENABLED Enable the extra bit.
0 RW Stop Bit Length.
Name Description
SHORT Short: Stop bit is active for one bit time.
LONG Long: Stop bit is active for two bit times (data length = 6, 7, or 8 bits) or
1.5 bit times (data length = 5 bits).
6 5
Reset Access Description
Varies RW Serial Port Data Buffer.
Universal Asynchronous Receiver/Transmitter 1 (UART1)
4 3
SBUF1
RW
Varies
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