C8051F388 Datasheet, PDF (208/285 Pages) –

C8051F388/9/A/B
SFR Definition 23.3. SBUF1: UART1 Data Buffer
Bit
7
6
5
4
3
2
1
0
Name
SBUF1[7:0]
Type
R/W
Reset
0
0
0
0
0
0
0
0
SFR Address = 0xD3; SFR Page = All Pages
Bit Name
Description
Write
Read
7:0 SBUF1[7:0] Serial Data Buffer Bits.
Writing a byte to SBUF1 Reading SBUF1 retrieves
This SFR is used to both send ^{initiates the transmission. data from the receive}
data from the UART and to ^{When data is written to FIFO. When read, the old-}
read received data from the ^{SBUF1, it first goes to the est byte in the receive}
UART1 receive FIFO.
Transmit Holding Register, FIFO is returned, and
where it is held for serial removed from the FIFO.
transmission. When the Up to three bytes may be
transmit shift register is held in the FIFO. If there
available, data is trans- are additional bytes avail-
ferred into the shift regis- able in the FIFO, the RI1
ter, and SBUF1 may be bit will remain at logic 1,
written again.
even after being cleared
by software.
208
Rev. 1.1