xr16m780 Exar Corporation, xr16m780 Datasheet - Page 51

• Manufacturer Part Number: xr16m780
• Description: 1.62v To 3.63v High Performance Uart With 64-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
F
F
IGURE
IGURE
RX
INT
RXRDY#
INT*
TXRDY#
IOW#
IOR#
(Reading data out
of RX FIFO)
TX
(Unloading)
(Loading data
into THR)
*INT is cleared when the ISR is read or when data is loaded into the THR.
23. T
24. R
IER[1]
enabled
RANSMIT
ECEIVE
T
First Byte is
Received in
WRI
RX FIFO
Start
Bit
S
D0:D7
T
R
Start
Stop
WT
R
Bit
EADY
Bit
EADY
S
ISR is read
& I
T
SSR
T
& I
D0:D7
D0:D7
SRT
NTERRUPT
NTERRUPT
T
T
WRI
Trigger Level or RX Data
Stop
RX FIFO fills up to RX
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 64-BYTE FIFO
Bit
T
D0:D7
T
T
IMING
T
SSI
Timeout
IMING
WT
[FIFO M
S
[N
ISR is read
D0:D7
T
D0:D7
ON
SRT
51
-FIFO M
ODE
T
]
S
ODE
D0:D7
]
T
S
T
T
WRI
RRI
D0:D7
T
T
WT
RX FIFO drops
Trigger Level
below RX
S
D0:D7
ISR is read
D0:D7
T
SRT
Empties
T
FIFO
RR
T
TXNonFIFO
RXINTDMA#
XR16M780