xr20m1280 Exar Corporation, xr20m1280 Datasheet - Page 35

• Manufacturer Part Number: xr20m1280
• Description: I2c/spi Uart With 128-byte Fifo And Integrated Level Shifters
• Manufacturer: Exar Corporation

REV. P1.1.1
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.
3.6
T
Table-A
Table-B
Table-C
Table-D
T
RIGGER
ABLE
Line Control Register (LCR) - Read/Write
FCTR
B
IT
0
0
1
1
-5
T
ABLE
FCTR
B
IT
0
1
0
1
13: T
-4
RANSMIT AND
B
FCR
IT
0
0
1
1
0
0
1
1
0
0
1
1
X
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
-7
BIT-1
0
0
1
1
B
FCR
IT
X
0
1
0
1
0
1
0
1
0
1
0
1
-6
R
ECEIVE
B
FCR
BIT-0
IT
X
0
0
0
1
1
0
0
1
1
0
1
0
1
-5
PRELIMINARY
FIFO T
BIT
FCR
35
X
0
0
1
0
1
0
1
0
1
-4
RIGGER
T
Programmable
FCTR[7] = 0.
RIGGER
W
1 (default)
R
via TRG
register.
ORD LENGTH
5 (default)
ECEIVE
T
14
16
24
28
16
56
60
ABLE AND
4
8
8
8
6
7
8
L
EVEL
Programmable
FCTR[7] = 1.
L
1 (default)
T
EVEL
T
register.
via TRG
RANSMIT
RIGGER
L
EVEL
16
24
30
16
32
56
8
8
S
ELECTION
16C550, 16x255x,
16x554, 16x57x,
16x58x
16C650A, 16L651,
16x265x, 16x564
16x654
16x275x, 16C285x,
16C850, 16C854,
16C864
XR20M1280
C
OMPATIBILITY