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參數(shù)資料
| 型號： | a8251 |
| 廠商： | Altera Corporation |
| 英文描述： | Programmable Communications Interface(可編程通信接口) |
| 中文描述： | 可編程通信接口（可編程通信接口） |
| 文件頁數(shù)： | 6/21頁 |
| 文件大?。?/td> | 338K |
| 代理商： | A8251 |
30
Altera Corporation
a8251 Programmable Communications Interface Data Sheet
Parity Select
Bits 4 and 5 (
pen
,
ep
) of the MIR are the parity select bits, which are used
to select the parity options.
Table 5
shows the logic level of the parity
select bits and the corresponding parity.
Stop Bit Select
Bits 6 and 7 (
s1
,
s2
) of the MIR are the stop bit select bits, which are used
to determine the number of stop bits.
Table 6
shows the logic level of the
stop bit select bits and the corresponding number of stop bits.
Synchronous Operation
When the
a8251
is programmed for synchronous operation, the MIR
contains the bits shown in
Table 7
.
Table 4. Word Length Select Bits
l2
l1
Word Length
0
0
1
1
0
1
0
1
5
6
7
8
Table 5. Parity Select Bits
ep
pen
Parity
0
0
1
1
0
1
0
1
None
Odd
None
Even
Table 6. Stop Bit Select BIts
s2
s1
Number of Stop Bits
0
0
1
1
0
1
0
1
Invalid
1
1.5
2
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