xr16v2651im Exar Corporation, xr16v2651im Datasheet - Page 44

• Manufacturer Part Number: xr16v2651im
• Description: High Performance Duart With 32-byte Fifo And Powersave
• Manufacturer: Exar Corporation

XR16V2651
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
F
F
IGURE
IGURE
INT*
IOW#
RX
INT
RXRDY#
TXRDY#
(Loading data
into THR)
IOR#
(Reading data out
of RX FIFO)
TX
*INT is cleared when the ISR is read or when data is loaded into the THR.
20. T
21. R
IER[1]
enabled
RANSMIT
ECEIVE
T
First Byte is
Received in
WRI
RX FIFO
Start
Bit
S
D0:D7
R
T
Start
WT
Stop
R
Bit
EADY
Bit
EADY
S
ISR is read
& I
T
T
SSR
& I
D0:D7
D0:D7
SRT
NTERRUPT
NTERRUPT
T
T
WRI
Trigger Level or RX Data
Stop
RX FIFO fills up to RX
Bit
T
D0:D7
T
IMING
T
T
SSI
IMING
Timeout
WT
[FIFO M
S
[N
ISR is read
D0:D7
T
ON
D0:D7
SRT
44
-FIFO M
ODE
T
, DMA D
S
ODE
D0:D7
]
FOR
T
ISABLED
S
T
T
WRI
C
RRI
D0:D7
HANNELS
]
T
FOR
T
WT
RX FIFO drops
Trigger Level
below RX
S
C
A & B
HANNELS
D0:D7
ISR is read
D0:D7
T
SRT
Empties
T
RR
T
FIFO
TXNonFIFO
RXINTDMA#
A & B
REV. 1.0.2