XR16C850CM EXAR [Exar Corporation], XR16C850CM Datasheet - Page 49

• Manufacturer Part Number: XR16C850CM
• Description: 2.97V TO 5.5V UART WITH 128-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

xr
REV. 2.3.1
F
F
IGURE
IGURE
RXRDY#
RX
INT
IOR#
INT*
TXRDY#
IOW#
(Reading data
out of RHR)
TX
(Unloading)
(Loading data
into THR)
*INT is cleared when the ISR is read or when data is loaded into the THR.
25. R
26. T
IER[1]
enabled
RANSMIT
ECEIVE
T
WRI
R
T
Start
Start
Bit
WT
R
EADY
Bit
EADY
& I
ISR is read
D0:D7
T
& I
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
SSR
SSR
IMING
WT
[N
[N
ISR is read
ON
T
D0:D7
ON
D0:D7
SRT
49
-FIFO M
-FIFO M
ODE
ODE
2.97V TO 5.5V UART WITH 128-BYTE FIFO
T
RR
in RHR
1 Byte
]
Active
Ready
T
T
Data
]
SSR
SSR
T
WRI
T
WT
D0:D7
ISR is read
D0:D7
T
SRT
TXNonFIFO
T
RR
T
in RHR
1 Byte
Ready
Active
SSR
T
Data
SSR
XR16C850
RXNFM