xr16l2552im Exar Corporation, xr16l2552im Datasheet - Page 40

• 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
INT
RXRDY#
INT*
TXRDY#
IOW#
RX
IOR#
TX
(Unloading)
(Loading data
into THR)
(Reading data
out of RHR)
*INT is cleared when the ISR is read or when data is loaded into the THR.
18. R
19. T
IER[1]
enabled
RANSMIT
ECEIVE
T
WRI
R
T
Start
Start
Bit
WT
R
EADY
Bit
EADY
ISR is read
& I
D0:D7
T
& I
D0:D7
SRT
NTERRUPT
NTERRUPT
T
WRI
Stop
Stop
Bit
Bit
T
RR
T
in RHR
1 Byte
Ready
Active
T
IMING
T
T
Data
T
SSR
IMING
SSR
WT
[N
[N
ISR is read
ON
T
ON
D0:D7
D0:D7
SRT
40
-FIFO M
-FIFO M
ODE
ODE
T
RR
in RHR
1 Byte
]
Ready
Active
T
T
Data
]
FOR
SSR
SSR
FOR
T
C
WRI
C
HANNELS
HANNELS
T
WT
D0:D7
A & B
A & B
ISR is read
D0:D7
T
SRT
xr
TXNonFIFO
T
RR
T
in RHR
1 Byte
Ready
Active
SSR
T
Data
SSR
RXNFM
REV. 1.1.1