xr16c864iq Exar Corporation, xr16c864iq Datasheet - Page 46

• Manufacturer Part Number: xr16c864iq
• Description: Quad Uart With Rx/tx Fifo Counters And 128-byte Fifo
• Manufacturer: Exar Corporation

XR16C864
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
F
F
IGURE
IGURE
RXRDY#
RX
INT
IOR#
(Reading data out
of RX FIFO)
RX
INT
RXRDY#
(Reading data out
of RX FIFO)
IOR#
21. R
22. 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
& I
T
& 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
46
ODE
ODE
T
T
, DMA D
, DMA E
S
S
D0:D7
D0:D7
T
NABLED
ISABLED
T
S
S
T
RRI
T
D0:D7
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
FIFO
RR
T
Empties
T
áç
áç
áç
áç
RR
T
FIFO
RXINTDMA#
A-D
A-D
RXFIFODMA
REV. 2.0.1