Figure 23.8. Sbuf1: Serial (Uart1) Port Data Buffer Register - Silicon Laboratories C8051F120 Manual

Figure 23.8. SBUF1: Serial (UART1) Port Data Buffer Register

R/W R/W
Bit7 Bit6
Bits7-0: SBUF1[7:0]: Serial Data Buffer Bits 7-0 (MSB-LSB)
This SFR accesses two registers; a transmit shift register and a receive latch register. When data is
written to SBUF1, it goes to the transmit shift register and is held for serial transmission. Writing a
byte to SBUF1 is what initiates the transmission. A read of SBUF1 returns the contents of the receive
latch.
R/W R/W R/W
Bit5 Bit4 Bit3
Rev. 1.2
C8051F120/1/2/3/4/5/6/7
R/W R/W
Bit2 Bit1
SFR Address:
R/W Reset Value
00000000
Bit0
0x99
SFR Page: 1
281