xr16l2550im Exar Corporation, xr16l2550im Datasheet - Page 39

• Manufacturer Part Number: xr16l2550im
• Description: Industry Smallest Package Uart With 2.25v To 5.5v Operation
• Manufacturer: Exar Corporation

REV. 1.1.2
F
F
IGURE
IGURE
RX
INT
RXRDY#
IOR#
(Reading data out
of RX FIFO)
RXRDY#
RX
INT
IOR#
(Reading data out
of RX FIFO)
20. R
21. R
ECEIVE
ECEIVE
First Byte is
Received in
RX FIFO
Start
Start
Bit
S
Bit
S
D0:D7
D0:D7
R
R
Stop
Bit
EADY
EADY
Trigger Level or RX Data
RX FIFO fills up to RX
Stop
Bit
S
S
& I
T
& I
SSR
Timeout
D0:D7
D0:D7
NTERRUPT
NTERRUPT
T
T
Trigger Level or RX Data
RX FIFO fills up to RX
T
T
D0:D7
D0:D7
T
T
IMING
IMING
SSI
SSI
Timeout
[FIFO M
[FIFO M
S
S
T
SSR
D0:D7
D0:D7
39
ODE
ODE
T
T
, DMA D
, DMA E
S
LOW VOLTAGE DUART WITH 16-BYTE FIFO
S
D0:D7
D0:D7
T
NABLED
ISABLED
T
S
S
T
T
RRI
D0:D7
RRI
D0:D7
]
]
FOR
FOR
T
T
RX FIFO drops
RX FIFO drops
Trigger Level
Trigger Level
below RX
S
C
below RX
C
S
HANNELS
D0:D7
HANNELS
D0:D7
Empties
T
Empties
T
FIFO
RR
T
T
FIFO
RR
XR16L2550
RXINTDMA#
A & B
RXFIFODMA
A & B