Rainbow Electronics MAX3107 - Manual (Page 28)

28 _____________________________________________________________________________________
MAX3107
SPI/I
2
C UART with 128-Word FIFOs
and Internal Oscillator
Bit 0: RTimeout
The RTimeout bit indicates that stale data is present in the receive FIFO. RTimeout is set when the youngest character
resides in the RxFIFO for longer than the period programmed into the RxTimeOut register. The timeout counter restarts
when at least one character is read out of the RxFIFO or a new character is received by the RxFIFO. If the value in
RxTimeOut is zero, RTimeout is disabled. RTimeout is cleared when a word is read out of the RxFIFO or a new word is
received. The RTimeout flag can generate an ISR[0] interrupt, if enabled through LSRIntEn[0].
Bits 7 and 6: No Function
Bit 5: MltDrpIntEn
The MltDrpIntEn bit enables routing the SpclCharInt[5]: MultiDropInt interrupt to ISR[1]. If MltDrpIntEn is set low
(default), the MultiDropInt is not routed to the ISR[1].
Bit 4: BREAKIntEn
The BREAKIntEn bit enables routing the SpclCharInt[4]: BREAKInt interrupt to ISR[1]. If BREAKIntEn is set low (default),
the BREAKInt is not routed to the ISR[1].
Bit 3: XOFF2IntE
The XOFF2IntEn bit enables routing the SpclCharInt[3]: XOFF2Int interrupt to ISR[1]. If XOFF2IntEn is set low (default),
the XOFF2Int is not routed to the ISR[1].
Bit 2: XOFF1IntEn
The XOFF1IntEn bit enables routing the SpclCharInt[2]: XOFF1Int interrupt to ISR[1]. If XOFF1IntEn is set low (default),
the XOFF1Int is not routed to the ISR[1].
Bit 1: XON2IntEn
The XON2IntEn bit enables routing the SpclCharInt[1]: XON2Int interrupt to ISR[1]. If XON2IntEn is set low (default),
the XON2Int is not routed to the ISR[1].
Bit 0: XON1IntEn
The XON1IntEn bit enables routing the SpclCharInt[0]: XON1Int interrupt to ISR[1]. If XON1IntEn is set low (default),
the XON1Int is not routed to the ISR[1].
SpclChrIntEn—Special Character Interrupt Enable Register
ADDRESS: 0x05
MODE: R/W
BIT 7 6 5 4 3 2 1 0
NAME — — MltDrpIntEn BREAKIntEn XOFF2IntEn XOFF1IntEn XON2IntEn XON1IntEn
RESET 0 0 0 0 0 0 0 0