Intel 8XC196MC manual SBUFxRX Address 1F80H, 1F88H = 0-1 8XC196MH, 8XC196MH Data Received Bit

		REGISTERS
		SBUFx_RX
SBUFx_RX	Address:	1F80H, 1F88H
x = 0–1 (8XC196MH)	Reset State:	00H

The serial port receive buffer x (SBUFx_RX) register contains data received from serial port x. 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 SBUFx_RX. If data in the shift register is loaded into SBUFx_RX before the previous byte is read, the overflow error bit is set (SPx_STATUS.2). The data in SBUFx_RX will always be the last byte received, never a combination of the last two bytes.

	7	0
8XC196MH	Data Received
Bit	Function
Number
7:0	Data Received
	This register contains the last byte of data received from the serial port.

C-47