XR16C2450 Datasheet, PDF (25/31 Pages) Exar Corporation – 2.97V TO 5.5V DUART

xr
REV. 1.0.0
FIGURE 12. INTERRUPT TIMING FOR CHANNELS A & B
XR16C2450
2.97V TO 5.5V DUART
RX
Start
Bit
D0:D7
Stop
Bit
D0:D7
T_SSI
T_SSI
1 Byte
1 Byte
INT
in RHR
in RHR
IOR#
(Reading data
out of RHR)
T_RSI
T_RSI
FIGURE 13. INTERRUPT TIMING FOR CHANNELS A & B
D0:D7
T_SSI
1 Byte
in RHR
T_RSI
RXNFM
TX
(Unloading)
IER[1]
enabled
Start
Bit
T_INT
D0:D7
Stop
Bit
T_INT
INT*
T_WRI
T_WRI
ISR is read
IOW#
(Loading data
into THR)
D0:D7
ISR is read
D0:D7
T_INT
T_WRI
ISR is read
*INT is cleared when the ISR is read or when data is loaded into the THR.
TXNonFIFO
25