XR16L2751CM EXAR [Exar Corporation], XR16L2751CM Datasheet - Page 29

• Manufacturer Part Number: XR16L2751CM
• Description: 2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
• Manufacturer: EXAR [Exar Corporation]

XR16L2751
2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
REV. 1.0.0
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.
4.7
FCTR
B
IT
0
0
1
1
-5
Line Control Register (LCR) - Read/Write
FCTR
B
IT
0
1
0
1
-4
B
FCR
IT
X
0
0
1
1
0
0
1
1
0
0
1
1
T
-7
ABLE
B
FCR
11: T
IT
X
0
1
0
1
0
1
0
1
0
1
0
1
-6
BIT-1
RANSMIT AND
0
0
1
1
B
FCR
IT
X
0
0
0
1
1
0
0
1
1
-5
FCR
BIT
0
0
1
0
1
0
1
0
1
X
BIT-0
-4
R
0
1
0
1
ECEIVE
T
Programmable
FCTR[7] = 0.
RIGGER
1 (default)
R
via TRG
register.
29
ECEIVE
14
16
24
28
16
56
60
FIFO T
4
8
8
8
L
EVEL
W
RIGGER
ORD LENGTH
5 (default)
T
Programmable
RIGGER
FCTR[7] = 1.
1 (default)
T
6
7
8
via TRG
register.
RANSMIT
16
24
30
16
32
56
L
8
8
EVEL
L
EVEL
S
ELECTION
Table-A. 16C550, 16C2550,
16C2552, 16C554, 16C580
compatible.
Table-B. 16C650A compatible.
Table-C. 16C654 compatible.
Table-D. 16C850, 16L2750,
16L2752, 16C2850, 16C2852,
16C854, 16C864, 16C872 com-
patible.
C
OMPATIBILITY
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