xr16v2552il32 Exar Corporation, xr16v2552il32 Datasheet - Page 14

• Manufacturer Part Number: xr16v2552il32
• Description: High Performance Duart With 16-byte Fifo
• Manufacturer: Exar Corporation

XR16V2552
HIGH PERFORMANCE DUART WITH 16-BYTE FIFO
F
F
IGURE
IGURE
16X or 8X or 4X Clock
16X or 8X or 4X C lock
Receive Data
Byte and Errors
8. R
9. R
16 bytes by 11-bit
( DLD[5:4] )
( D LD [5:4] )
and E rrors
D ata B yte
ECEIVER
ECEIVER
R eceive
wide FIFO
O
O
PERATION IN NON
PERATION IN
Receive Data Shift
Register (RSR)
LS R bits
Tags in
E rror
4:2
Data FIFO
Receive
FIFO
Receive
Data
R eceive D ata S hift
-FIFO M
R egister (R S R )
AND
H olding R egister
R eceive D ata
A
UTO
Validation
ODE
(R H R)
Data Bit
Data falls to
Data fills to
Trigger=8
Example
RTS F
FIFO
14
4
14
: - RX FIFO trigger level selected at 8 bytes
LOW
RTS# re-asserts when data falls below the flow
control trigger level to restart remote transmitter.
RTS# de-asserts when data fills above the flow
control trigger level to suspend remote transmitter.
Enable by EFR bit-6=1, MCR bit-1.
Enable by EFR bit-6=1, MCR bit-1.
desired FIFO trigger level.
RHR Interrupt (ISR bit-2) programmed for
FIFO is Enabled by FCR bit-0=1
V alidation
C
(See Note Below)
D ata B it
ONTROL
M
R H R Interrupt (IS R bit-2)
ODE
Receive Data Characters
R eceive D ata C haracters
R X FIFO 1
RXFIFO1
REV. 1.0.2