xr16v2552il32 Exar Corporation, xr16v2552il32 Datasheet - Page 43
xr16v2552il32
Manufacturer Part Number
xr16v2552il32
Description
High Performance Duart With 16-byte Fifo
Manufacturer
Exar Corporation
Datasheet
1.XR16V2552IL32.pdf
(48 pages)
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REV. 1.0.2
F
F
IGURE
IGURE
(Unloading)
(Unloading)
(Loading data
(Loading data
*INT cleared when the ISR is read or when TX FIFO fills up to trigger level.
*INT is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
21. T
22. T
into FIFO)
into FIFO)
TX
INT*
TXRDY#
IOW#
TX
INT*
TXRDY#
IOW#
RANSMIT
RANSMIT
TX FIFO
enabled
Empty
enabled
IER[1]
IER[1]
TX FIFO
Data in
Start
Bit
S
R
R
D0:D7
EADY
EADY
ISR Read
Stop
Bit
T
Start
& I
Bit
& I
ISR is read
S
S
T
D0:D7
D0:D7
NTERRUPT
NTERRUPT
WT
TX FIFO fills up
to trigger level
TX FIFO fills up
to trigger level
Stop
Bit
T
T
T
T
S
IMING
IMING
D0:D7
D0:D7
[FIFO M
[FIFO M
T
S
S
TX FIFO
43
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
Full
D0:D7
D0:D7
T
T
WRI
WRI
ODE
ODE
T
T
, DMA M
, DMA M
T
T
SRT
SI
T
S
S
D0:D7
D0:D7
ODE
below trigger level
ODE
T
TX FIFO drops
WT
T
T
D
E
S
S
NABLED
ISABLED
ISR is read
D0:D7
D0:D7
below trigger level
TX FIFO drops
T
T
]
T
SI
]
empty location
FOR
FOR
At least 1
in FIFO
ISR Read
C
C
S
S
HANNELS
Last Data Byte
Last Data Byte
HANNELS
XR16V2552
Transmitted
Transmitted
D0:D7
D0:D7
TXDMA#
TX FIFO
TXDMA
Empty
T
SRT
T
T
A & B
A & B
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