xr17l152im Exar Corporation, xr17l152im Datasheet - Page 35
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xr17l152im
Manufacturer Part Number
xr17l152im
Description
3.3v Pci Bus Dual Uart
Manufacturer
Exar Corporation
Datasheet
1.XR17L152IM.pdf
(55 pages)
- Current page: 35 of 55
- Download datasheet (514Kb)
XR17L152
3.3V PCI BUS DUAL UART
REV. 1.1.0
Line Control Register (LCR)
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.
FCTR
B
IT
0
0
1
1
-7
FCTR
B
IT
0
1
0
1
-6
B
FCR
IT
X
0
0
1
1
0
0
1
1
0
0
1
1
-7
T
ABLE
B
FCR
IT
X
0
1
0
1
0
1
0
1
0
1
0
1
13: T
-6
BIT-1
RANSMIT AND
B
0
0
1
1
FCR
IT
X
0
0
0
1
1
0
0
1
1
-5
BIT
FCR
X
0
0
1
0
1
0
1
0
1
-4
BIT-0
R
0
1
0
1
ECEIVE
via RXTRG reg-
T
Programmable
RIGGER
1 (default)
R
35
ECEIVE
ister
14
16
24
28
16
56
60
FIFO T
4
8
8
8
L
EVEL
W
RIGGER
ORD LENGTH
5 (default)
via TXTRG reg-
T
Programmable
RIGGER
6
7
8
1 (default)
T
RANSMIT
L
ister
16
24
30
16
32
56
EVEL
8
8
L
EVEL
S
ELECTION
Table-A. 16C550, 16C2550,
16C2552, 16C554, 16C580
compatible.
Table-B. 16C650A compatible.
Table-C. 16C654 compatible.
Table-D. 16C850, 16C2850,
16C2852, 16C854, 16C864,
16C872 compatible.
DISCONTINUED
C
OMPATIBILITY
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