xr16c864iq Exar Corporation, xr16c864iq Datasheet - Page 45

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

áç
áç
áç
áç
REV. 2.0.1
F
F
IGURE
IGURE
RXRDY#
INT*
TXRDY#
IOW#
RX
INT
IOR#
TX
(Unloading)
(Loading data
into THR)
(Reading data
out of RHR)
*INT is cleared when the ISR is read or when data is loaded into the THR.
19. R
20. T
IER[1]
enabled
RANSMIT
ECEIVE
T
WRI
R
T
Start
Start
Bit
R
WT
Bit
EADY
EADY
& I
ISR is read
D0:D7
& I
T
D0:D7
SRT
NTERRUPT
NTERRUPT
T
WRI
Stop
Stop
Bit
Bit
T
RR
T
in RHR
1 Byte
Ready
Active
T
IMING
T
T
Data
T
IMING
SSR
SSR
WT
[N
[N
ISR is read
ON
T
D0:D7
ON
D0:D7
SRT
45
-FIFO M
-FIFO M
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
ODE
ODE
T
RR
in RHR
1 Byte
]
Ready
Active
T
T
Data
]
FOR
SSR
SSR
FOR
T
C
WRI
C
HANNELS
HANNELS
T
WT
D0:D7
A-D
A-D
ISR is read
D0:D7
T
SRT
TXNonFIFO
T
RR
T
in RHR
1 Byte
Ready
Active
SSR
T
Data
SSR
XR16C864
RXNFM