XR16L580 Exar Corporation, XR16L580 Datasheet - Page 41

• Manufacturer Part Number: XR16L580
• Description: Smallest 2.25 to 5.5V Uart With 16-Byte Fifo And Power-save
• Manufacturer: Exar Corporation

áç
áç
REV. 1.2.0
áç
áç
F
F
IGURE
IGURE
RX
INT
INT*
IOW#
IOR#
(Reading data out
of RX FIFO)
TX
(Unloading)
(Loading data
into THR)
21. T
22. R
IER[1]
enabled
T
RANSMIT
WRI
ECEIVE
Start
Bit
S
*INT is cleared when the ISR is read or when data is loaded into the THR.
D0:D7
Start
Stop
R
Bit
Bit
R
EADY
EADY
S
ISR is read
T
I
SSR
T
D0:D7
NTERRUPT
D0:D7
I
SRT
NTERRUPT
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
T
T
WRI
Trigger Level or RX Data
RX FIFO fills up to RX
Stop
T
Bit
T
IMING
IMING
D0:D7
T
SSI
Timeout
[FIFO M
[N
S
ON
ISR is read
D0:D7
-FIFO M
T
D0:D7
41
SRT
ODE
T
]
ODE
S
D0:D7
]
T
S
T
T
WRI
RRI
D0:D7
T
RX FIFO drops
Trigger Level
below RX
S
D0:D7
ISR is read
D0:D7
T
SRT
T
XR16L580
TXNonFIFO
RXINTDMA#