xr16m654 Exar Corporation, xr16m654 Datasheet - Page 49

• Manufacturer Part Number: xr16m654
• Description: 1.62v To 3.63v Quad Uart With 64-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
F
F
IGURE
IGURE
RXRDY#
RX
INT
IOR#
(Reading data out
of RX FIFO)
(Unloading)
(Loading data
*INT is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
into FIFO)
TX
INT*
TXRDY#
IOW#
24. R
25. T
RANSMIT
ECEIVE
TX FIFO
Empty
enabled
IER[1]
Start
Bit
S
TX FIFO
Data in
D0:D7
R
R
EADY
Trigger Level or RX Data
EADY
RX FIFO fills up to RX
Stop
Bit
S
& I
Start
Bit
ISR is read
S
& I
Timeout
D0:D7
NTERRUPT
T
D0:D7
WT
NTERRUPT
TX FIFO fills up
to trigger level
Stop
T
Bit
T
T
D0:D7
T
IMING
T
S
IMING
SSI
D0:D7
[FIFO M
S
[FIFO M
T
T
SSR
D0:D7
S
49
D0:D7
T
WRI
1.62V TO 3.63V QUAD UART WITH 64-BYTE FIFO
ODE
T
ODE
T
, DMA E
S
, DMA M
T
SI
D0:D7
T
S
D0:D7
NABLED
T
below trigger level
ODE
TX FIFO drops
S
T
RRI
D0:D7
T
D
S
ISR is read
]
ISABLED
FOR
D0:D7
T
RX FIFO drops
Trigger Level
C
below RX
S
T
HANNELS
]
D0:D7
XR16M654/654D
FOR
Empties
C
T
S
Last Data Byte
RR
T
FIFO
HANNELS
Transmitted
D0:D7
A-D
RXFIFODMA
TXDMA#
TX FIFO
Empty
T
SRT
T
A-D