Intel 80C196NU Benutzerhandbuch
C-39
REGISTERS
SBUF_RX
SBUF_RX
Address:
Reset State:
1FB8H
00H
The serial port receive buffer (SBUF_RX) register contains data received from the serial port. The
serial port receiver is buffered and can begin receiving a second data byte before the first byte is
read. Data is held in the receive shift register until the last data bit is received, then the data byte is
loaded into SBUF_RX. If data in the shift register is loaded into SBUF_RX before the previous byte is
read, the overflow error bit is set (SP_STATUS.2). The data in SBUF_RX will always be the last byte
received, never a combination of the last two bytes.
serial port receiver is buffered and can begin receiving a second data byte before the first byte is
read. Data is held in the receive shift register until the last data bit is received, then the data byte is
loaded into SBUF_RX. If data in the shift register is loaded into SBUF_RX before the previous byte is
read, the overflow error bit is set (SP_STATUS.2). The data in SBUF_RX will always be the last byte
received, never a combination of the last two bytes.
7
0
Data Received
Bit
Number
Function
7:0
Data Received
This register contains the last byte of data received from the serial port.