XR16C850CM EXAR [Exar Corporation], XR16C850CM Datasheet - Page 32

• Manufacturer Part Number: XR16C850CM
• Description: 2.97V TO 5.5V UART WITH 128-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

XR16C850
2.97V TO 5.5V UART WITH 128-BYTE FIFO
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.
4.6
T
Table-C
Table-D
Table-A
Table-B
T
RIGGER
ABLE
Line Control Register (LCR) - Read/Write
FCTR
B
IT
0
0
1
1
T
-5
ABLE
FCTR
B
10: T
IT
0
1
0
1
-4
RANSMIT AND
B
FCR
IT
X
0
0
1
1
0
0
1
1
0
0
1
1
BIT-1
-7
0
0
1
1
B
FCR
IT
X
0
1
0
1
0
1
0
1
0
1
0
1
-6
R
ECEIVE
BIT-0
B
FCR
0
1
0
1
IT
X
0
0
0
1
1
0
0
1
1
-5
FIFO T
32
BIT
FCR
X
0
0
1
0
1
0
1
0
1
RIGGER
-4
W
T
Programmable
FCTR[7] = 0.
RIGGER
5 (default)
ORD LENGTH
1 (default)
R
via TRG
register.
T
ABLE AND
ECEIVE
6
7
8
14
16
24
28
16
56
60
4
8
8
8
L
EVEL
L
Programmable
FCTR[7] = 1.
EVEL
1 (default)
T
T
register.
via TRG
RANSMIT
RIGGER
L
EVEL
16
24
30
16
32
56
8
8
S
ELECTION
16C550, 16C2550,
16C2552, 16C554,
16C580
16C650A
16C654
16L2752, 16L2750,
16C2852, 16C854,
16C864
xr
C
OMPATIBILITY
REV. 2.3.1