xr16l2552im Exar Corporation, xr16l2552im Datasheet - Page 42

• Manufacturer Part Number: xr16l2552im
• Description: Industry Smallest Package Uart With 2.25v To 5.5v Operation
• Manufacturer: Exar Corporation

XR16L2552
2.25V TO 5.5V DUART WITH 16-BYTE FIFO
F
F
IGURE
IGURE
(Unloading)
(Loading data
*INT is cleared when the ISR is read or when there is at least one character in the FIFO.
(Unloading)
(Loading data
*INT is cleared when the ISR is read or when there is at least one character in the FIFO.
22. T
23. T
into FIFO)
TX
INT*
TXRDY#
IOW#
into FIFO)
TX
INT*
TXRDY#
IOW#
RANSMIT
RANSMIT
TX FIFO
TX FIFO
Empty
Empty
enabled
enabled
IER[1]
IER[1]
TX FIFO
Data in
R
R
EADY
EADY
Start
Start
& I
& I
Bit
ISR is read
Bit
S
ISR is read
S
T
D0:D7
D0:D7
NTERRUPT
NTERRUPT
T
WT
T
WRI
WRI
Stop
Stop
Bit
Bit
T
T
longer empty
longer empty
TX FIFO no
TX FIFO no
T
T
S
S
IMING
IMING
D0:D7
D0:D7
[FIFO M
[FIFO M
T
T
S
S
TX FIFO
42
Full
D0:D7
D0:D7
ODE
ODE
T
T
, DMA M
, DMA M
T
SRT
T
T
S
S
D0:D7
D0:D7
ODE
ODE
T
WT
T
T
D
E
S
S
NABLED
ISABLED
D0:D7
D0:D7
T
T
]
]
empty location
FOR
FOR
At least 1
in FIFO
T
T
SI
SI
C
C
S
S
xr
HANNELS
Last Data Byte
Last Data Byte
HANNELS
Transmitted
Transmitted
D0:D7
D0:D7
TXDMA#
TXDMA
TX FIFO
TX FIFO
Empty
Empty
T
SRT
T
T
REV. 1.1.1
A & B
A & B