XR16L570 Exar Corporation, XR16L570 Datasheet - Page 41

• Manufacturer Part Number: XR16L570
• Description: SMALLEST 1.62V TO 5.5V UART
• Manufacturer: Exar Corporation

xr
REV. 1.0.0
F
F
IGURE
IGURE
RX
INT
IOR#
(Reading data out
of RX FIFO)
(Loading data
*INT is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
into FIFO)
TX
INT*
IOW#
20. R
21. T
TX FIFO
Empty
enabled
RANSMIT
ECEIVE
IER[1]
Start
Bit
S
D0:D7
Stop
R
Bit
R
EADY
EADY
S
Start
T
Bit
I
ISR is read
SSR
S
NTERRUPT
D0:D7
I
NTERRUPT
D0:D7
SMALLEST 1.62V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
TX FIFO fills up
to trigger level
T
Stop
Bit
T
Trigger Level or RX Data
RX FIFO fills up to RX
T
T
IMING
D0:D7
IMING
T
S
SSI
Timeout
D0:D7
[FIFO M
[FIFO M
S
T
D0:D7
S
41
ODE
D0:D7
T
ODE
WRI
T
]
]
T
S
T
SI
D0:D7
T
S
D0:D7
T
below trigger level
S
TX FIFO drops
T
RRI
D0:D7
T
S
ISR is read
D0:D7
T
RX FIFO drops
Trigger Level
below RX
S
T
D0:D7
T
S
Last Data Byte
Transmitted
D0:D7
XR16L570
RXINTDMA#
T
TX INT