參數(shù)資料
型號(hào): XR16L784
廠商: Exar Corporation
英文描述: HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
中文描述: 高性能2.97V至5.5V UART的四
文件頁數(shù): 31/52頁
文件大小: 625K
代理商: XR16L784
á
REV. 1.2.0
XR16L784
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
31
4.6
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.
Line Control Register (LCR) - Read/Write
T
ABLE
14: T
RANSMIT
AND
R
ECEIVE
FIFO T
RIGGER
T
ABLE
AND
L
EVEL
S
ELECTION
T
RIGGER
T
ABLE
FCTR
B
IT
-5
FCTR
B
IT
-4
FCR
B
IT
-7
FCR
B
IT
-6
FCR
B
IT
-5
FCR
BIT
-4
R
ECEIVE
T
RIGGER
L
EVEL
T
RANSMIT
T
RIGGER
L
EVEL
C
OMPATIBILITY
Table-A
0
0
0
0
1
1
0
1
0
1
0
0
1 (default)
4
8
14
1 (default)
16C550, 16C2550,
16C2552, 16C554,
16C580
Table-B
0
1
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
8
16
24
28
16
8
24
30
16C650A
Table-C
1
0
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
8
16
56
60
8
16
32
56
16C654
Table-D
1
1
X
X
X
X
Programmable
via TRG
register.
FCTR[7] = 0.
Programmable
via TRG
register.
FCTR[7] = 1.
16L2752, 16L2750,
16C2852, 16C850,
16C854, 16C864
BIT-1
BIT-0
W
ORD
LENGTH
0
0
5 (default)
0
1
6
1
0
7
1
1
8
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