xr16m680 Exar Corporation, xr16m680 Datasheet - Page 51

• Manufacturer Part Number: xr16m680
• Description: 1.62v To 3.63v High Performance Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
F
IGURE
(Unloading)
(Loading data
*INT is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
into FIFO)
TX
INT*
TXRDY#
IOW#
25. T
RANSMIT
TX FIFO
Empty
enabled
IER[1]
TX FIFO
Data in
R
EADY
Start
Bit
ISR is read
S
& I
T
D0:D7
WT
NTERRUPT
TX FIFO fills up
to trigger level
Stop
Bit
T
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
T
S
IMING
D0:D7
[FIFO M
T
S
51
D0:D7
T
WRI
ODE
T
]
T
SI
T
S
D0:D7
below trigger level
TX FIFO drops
T
S
ISR is read
D0:D7
T
S
Last Data Byte
Transmitted
D0:D7
XR16M680
TXDMA#
TX FIFO
Empty
T
SRT
T