xr16m698 Exar Corporation, xr16m698 Datasheet - Page 55

• Manufacturer Part Number: xr16m698
• Description: 1.62v To 3.63v High Performance Octal Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
F
F
F
IGURE
IGURE
IGURE
IN T # *
IO W #
RX
INT#
IOR#
(Reading data out
of RX FIFO)
T X
(U n lo a d in g )
(L o a d in g d a ta
in to T H R )
*T X in te rru p t is c le a re d w h e n th e IS R is re a d o r w h e n d a ta is lo a d e d in to th e T H R .
(Unloading)
(Loading data
*TX interrupt is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
20. T
21. R
22. T
into FIFO )
TX
INT#*
IO W #
IE R [1 ]
e n a b le d
RANSMIT
RANSMIT
ECEIVE
T
TX FIFO
Em pty
W R I
enabled
IER [1]
Start
Bit
S
D0:D7
I
NTERRUPT
I
S ta rt
I
NTERRUPT
Trigger Level or RX Data
NTERRUPT
B it
RX FIFO fills up to RX
S
IS R is re a d
Start
Tim eout
B it
ISR is read
D 0 :D 7
S
D0:D7
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
D 0:D 7
T
T
IMING
T
TX FIFO fills up
IMING
IMING
to trigger level
T
T
S top
Bit
W R I
T
S to p
[FIFO M
B it
[N
[FIFO M
D0:D7
ON
T
S
SSI
-FIFO M
D 0:D 7
ODE
ODE
S
IS R is re a d
]
T
D0:D7
D 0 :D 7
]
S
55
ODE
D 0:D 7
T
W R I
T
]
below trigger level
T
S
TX FIFO drops
T
D0:D7
SI
T
S
D0:D 7
T
S
T
T
W R I
RRI
D0:D7
T
S
ISR is read
D 0:D 7
T
RX FIFO drops
Trigger Level
below RX
S
T
D0:D7
IS R is re a d
D 0 :D 7
T
T
RR
S
Last Data B yte
Transm itted
XR16M698
D 0:D 7
T