參數(shù)資料
型號: XR16V2750IM-0B-EB
廠商: Exar Corporation
文件頁數(shù): 22/52頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR V2750 48TQFP
標(biāo)準(zhǔn)包裝: 1
系列: *
XR16V2750
29
REV. 1.0.3
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
4.6
Line Control Register (LCR) - Read/Write
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.
TABLE 10: TRANSMIT AND RECEIVE FIFO TRIGGER TABLE AND LEVEL SELECTION
TRIGGER
TABLE
FCTR
BIT-5
FCTR
BIT-4
FCR
BIT-7
FCR
BIT-6
FCR
BIT-5
FCR
BIT
-4
RECEIVE
TRIGGER LEVEL
TRANSMIT
TRIGGER
LEVEL
COMPATIBILITY
Table-A
0
1
0
1
0
1
0
1 (default)
4
8
14
1 (default)
16C550, 16C2550,
16C2552, 16C554,
16C580
Table-B
0
1
0
1
0
1
0
1
0
1
0
1
0
1
8
16
24
28
16
8
24
30
16C650A
Table-C
1
0
1
0
1
0
1
0
1
0
1
0
1
8
16
56
60
8
16
32
56
16C654
Table-D
1
X
Programmable
via TRG
register.
FCTR[7] = 0.
Programmable
via TRG
register.
FCTR[7] = 1.
16L2752, 16C2850,
16C2852, 16C850,
16C854, 16C864
BIT-1
BIT-0
WORD LENGTH
0
5 (default)
0
1
6
1
0
7
1
8
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