xr16v2751im Exar Corporation, xr16v2751im Datasheet - Page 29

• Manufacturer Part Number: xr16v2751im
• Description: High Performance Duart With 64-byte Fifo And Powersave Feature
• Manufacturer: Exar Corporation

REV. 1.0.1
The Line Control Register is used to specify the asynchronous data communication format. The word or
character length, the number of stop bits, and the parity are selected by writing the appropriate bits in this
register.
LCR[1:0]: TX and RX Word Length Select
These two bits specify the word length to be transmitted or received.
LCR[2]: TX and RX Stop-bit Length Select
The length of stop bit is specified by this bit in conjunction with the programmed word length.
4.6
T
Table-C
Table-D
T
RIGGER
ABLE
Line Control Register (LCR) - Read/Write
FCTR
B
IT
1
1
-5
T
ABLE
FCTR
B
IT
0
1
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO AND POWERSAVE FEATURE
11: T
-4
RANSMIT AND
B
FCR
IT
0
0
1
1
X
-7
BIT-1
BIT-2
0
0
1
1
0
1
1
B
FCR
IT
X
0
1
0
1
-6
R
ECEIVE
B
FCR
LENGTH
BIT-0
5,6,7,8
W
6,7,8
IT
X
0
0
1
1
0
1
0
1
ORD
-5
5
FIFO T
BIT
FCR
29
X
0
1
0
1
-4
RIGGER
T
Programmable
S
FCTR[7] = 0.
RIGGER
W
TOP BIT LENGTH
(B
R
via TRG
register.
ORD LENGTH
5 (default)
1 (default)
ECEIVE
IT TIME
T
16
56
60
1-1/2
ABLE AND
8
6
7
8
2
L
EVEL
(
S
))
Programmable
FCTR[7] = 1.
L
T
EVEL
T
register.
via TRG
RANSMIT
RIGGER
L
EVEL
16
32
56
8
S
ELECTION
16C654
16L2752, 16C2850,
16C2852, 16C850,
16C854, 16C864
C
XR16V2751
OMPATIBILITY