ST16C2550CQ48 EXAR [Exar Corporation], ST16C2550CQ48 Datasheet - Page 31

• Manufacturer Part Number: ST16C2550CQ48
• Description: 2.97V TO 5.5V DUART WITH 16-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

xr
REV. 4.4.0
F
F
IGURE
IGURE
RX
INT
RXRDY#
IOR#
(Reading data out
of RX FIFO)
INT*
TXRDY#
IOW#
TX
(Unloading)
(Loading data
into THR)
*INT is cleared when the ISR is read or when data is loaded into the THR.
18. T
19. R
IER[1]
enabled
RANSMIT
ECEIVE
First Byte is
Received in
T
WRI
RX FIFO
Start
Bit
S
D0:D7
R
T
Start
Stop
WT
R
Bit
Bit
EADY
EADY
S
ISR is read
& I
T
SSR
T
& I
D0:D7
D0:D7
SRT
NTERRUPT
NTERRUPT
T
T
WRI
Trigger Level or RX Data
RX FIFO fills up to RX
Stop
Bit
T
D0:D7
T
T
IMING
SSI
T
Timeout
IMING
WT
[FIFO M
S
[N
ISR is read
D0:D7
T
D0:D7
ON
SRT
31
-FIFO M
ODE
T
, DMA D
S
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
D0:D7
ODE
]
FOR
T
ISABLED
S
T
T
WRI
RRI
C
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
FIFO
RR
T
TXNonFIFO
RXINTDMA#
A & B
ST16C2550