xr16c2850im Exar Corporation, xr16c2850im Datasheet - Page 44

• Manufacturer Part Number: xr16c2850im
• Description: Dual Uart With Tx And Rx Fifo Counters, 128 Bytes Of Fifos And Automatic Rs-485 Half Duplex Control
• Manufacturer: Exar Corporation

XR16C2850
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
F
F
IGURE
IGURE
RX
INT
RXRDY#
IOR#
(Reading data out
of RX FIFO)
RX
INT
RXRDY#
IOR#
(Reading data out
of RX FIFO)
22. R
23. R
ECEIVE
ECEIVE
First Byte is
Received in
RX FIFO
Start
Start
Bit
Bit
S
S
D0:D7
D0:D7
R
R
Stop
Bit
EADY
EADY
Trigger Level or RX Data
RX FIFO fills up to RX
Stop
Bit
S
S
T
& I
& I
SSR
D0:D7
Timeout
D0:D7
NTERRUPT
NTERRUPT
T
T
Trigger Level or RX Data
RX FIFO fills up to RX
T
T
D0:D7
D0:D7
T
IMING
IMING
T
SSI
Timeout
SSI
[FIFO M
[FIFO M
S
S
T
D0:D7
SSR
D0:D7
44
ODE
ODE
T
T
, DMA D
, DMA E
S
S
D0:D7
D0:D7
T
NABLED
ISABLED
T
S
T
S
RRI
D0:D7
T
RRI
D0:D7
]
]
FOR
FOR
T
T
RX FIFO drops
Trigger Level
RX FIFO drops
Trigger Level
below RX
S
C
C
below RX
S
HANNELS
HANNELS
D0:D7
D0:D7
Empties
T
RR
T
FIFO
Empties
T
xr
RR
T
FIFO
RXINTDMA#
A & B
A & B
RXFIFODMA
REV. 2.1.3