ST16C2552CJ44 EXAR [Exar Corporation], ST16C2552CJ44 Datasheet - Page 32

• Manufacturer Part Number: ST16C2552CJ44
• Description: 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

ST16C2552
2.97V TO 5.5V DUAL UART 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.
into FIFO)
TX
INT*
TXRDY#
IOW#
into FIFO)
20. T
21. T
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
Bit
ISR is read
Bit
S
ISR is read
& I
& I
S
T
D0:D7
D0:D7
T
WT
T
NTERRUPT
NTERRUPT
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
32
Full
D0:D7
D0:D7
ODE
ODE
T
T
T
, DMA M
, DMA M
SRT
T
T
S
S
D0:D7
D0:D7
T
ODE
ODE
WT
T
T
D
E
S
S
NABLED
ISABLED
D0:D7
D0:D7
T
T
]
empty location
]
FOR
At least 1
FOR
T
in FIFO
T
SI
SI
C
C
S
S
Last Data Byte
Last Data Byte
HANNELS
HANNELS
Transmitted
Transmitted
D0:D7
D0:D7
TXDMA#
TXDMA
TX FIFO
TX FIFO
Empty
Empty
T
SRT
T
T
REV. 4.2.1
A & B
A & B