xr16v2750 Exar Corporation, xr16v2750 Datasheet - Page 15

• Manufacturer Part Number: xr16v2750
• Description: High Performance Duart With 64-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.3
N
F
F
OTE
IGURE
IGURE
: Table-B selected as Trigger Table for
Receive Data
Byte and Errors
8. R
9. R
16X or 8X Clock
1 6 X o r 8 X C lo ck
64 bytes by 11-bit
(EMSR bit-7)
(E M S R b it-7 )
a n d E rro rs
D a ta B yte
R ece ive
ECEIVER
ECEIVER
FIFO
wide
O
O
PERATION IN NON
PERATION IN
Receive Data Shift
Register (RSR)
LS R b its
T a g s in
E rro r
4 :2
Data FIFO
FIFO
Receive
Receive
Data
R e ce ive D a ta S hift
-FIFO M
Figure 9
R e giste r (R S R )
AND
H o ldin g R e g ister
R e ce ive D a ta
A
UTO
ODE
Validation
Data falls to
(R H R )
Data Bit
Data fills to
Trigger=16
(
Table 10
Example
RTS F
FIFO
24
8
: - RX FIFO trigger level selected at 16
15
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
LOW
).
control trigger level to restart remote transmitter.
Enable by EFR bit-6=1, MCR bit-1.
Enable by EFR bit-6=1, MCR bit-1.
RTS# re-asserts when data falls below the flow
RTS# de-asserts when data fills above the flow
control trigger level to suspend remote transmitter.
(See Note Below)
RHR Interrupt (ISR bit-2) programmed for
desired FIFO trigger level.
FIFO is Enabled by FCR bit-0=1
V alid a tio n
C
D ata B it
ONTROL
bytes
R H R Inte rru pt (IS R b it-2 )
M
ODE
Receive Data Characters
R e ce ive D a ta C h a ra cte rs
XR16V2750
R X F IF O 1
RXFIFO1