xr16c864iq Exar Corporation, xr16c864iq Datasheet - Page 29

• Manufacturer Part Number: xr16c864iq
• Description: Quad Uart With Rx/tx Fifo Counters And 128-byte Fifo
• Manufacturer: Exar Corporation

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REV. 2.0.1
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.
4.6
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
-7
T
ABLE
B
FCR
IT
X
0
1
0
1
0
1
0
1
0
1
0
1
11: T
-6
BIT-1
RANSMIT AND
0
0
1
1
B
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
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
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
L
EVEL
W
RIGGER
ORD LENGTH
5 (default)
Programmable
FCTR[7] = 1.
1 (default)
6
7
8
T
T
via TRG
register.
RANSMIT
L
RIGGER
EVEL
L
16
24
30
16
32
56
8
8
EVEL
S
ELECTION
Table-A. 16C550, 16C2550,
16C2552, 16C554, 16C580
compatible.
Table-B. 16C650A compatible.
Table-C. 16C654 compatible.
Table-D. 16L2750, 16C2850,
16C2852, 16C850, 16C864
compatible.
C
OMPATIBILITY
XR16C864