Intel 8XC196MH, 8XC196MD, 8XC196MC manual SPxSTATUS, RPE/RB8 TXE

8XC196MC, MD, MH USER’S MANUAL

SPx_STATUS

SPx_STATUS	Address:	1F81H, 1F89H
x = 0–1 (8XC196MH)	Reset State:	00H

The serial port status (SPx_STATUS) register contains bits that indicate the status of serial port x.

8XC196MH

7

RPE/RB8 RI TI FE

0

TXE OE — —

Bit	Bit	Function
Number	Mnemonic
7	RPE/RB8	Received Parity Error/Received Bit 8
		RPE is set if parity is disabled (SPx_CON.2 = 0) and the ninth data bit
		received is high.
		RB8 is set if parity is enabled (SPx_CON.2 = 1) and a parity error occurred.
		Reading SPx_STATUS clears this bit.
6	RI	Receive Interrupt
		This bit is set when the last data bit is sampled. Reading SPx_STATUS
		clears this bit.
5	TI	Transmit Interrupt
		This bit is set at the beginning of the stop bit transmission. Reading
		SPx_STATUS clears this bit.
4	FE	Framing Error
		This bit is set if a stop bit is not found within the appropriate period of time.
		Reading SPx_STATUS clears this bit.
3	TXE	SBUFx_TX Empty
		This bit is set if the transmit buffer is empty and ready to accept up to two
		bytes. It is cleared when a byte is written to SBUFx_TX.
2	OE	Overrun Error
		This bit is set if data in the receive shift register is loaded into SBUFx_RX
		before the previous bit is read. Reading SPx_STATUS clears this bit.
1:0	—	Reserved; for compatibility with future devices, write zeros to these bits.

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