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參數(shù)資料
| 型號： | AD8151AST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理外設 |
| 英文描述： | 33 x 17, 3.2 Gb/s Digital Crosspoint Switch |
| 中文描述： | 7-BIT, DSP-CROSSBAR SWITCH, PQFP184 |
| 封裝： | 20 X 20 MM, PLASTIC, LQFP-184 |
| 文件頁數(shù)： | 12/36頁 |
| 文件大小： | 5326K |
| 代理商： | AD8151AST |
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AD8151
–12–
REV. 0
Control Interface Truth Tables
The following are truth tables for the control interface.
Table I. Basic Control Functions
Control Pins
WE
RESET
CS
RE
UPDATE
Function
0
1
X
1
X
X
X
X
X
X
Global Reset. Reset all second rank enable bits to zero (disable all outputs).
Control Disable. Ignore all logic (but the signal matrix still functions as
programmed). D[6:0] are high-impedance.
Single Output Preprogram. Write input configuration data from data bus D[6:0].
into first rank of latches for the output selected by the output address bus A[4:0].
Single Output Readback. Readback input configuration data from second rank of latches
onto data bus D[6:0] for the single output selected by the output address bus A[4:0].
Global Update. Copy input configuration data from all 17 first rank latches into second
rank of latches, updating signal matrix connections for all outputs.
Transparent Write and Update. It is possible to write data directly onto rank two. This
simplifies logic when synchronous signal matrix updating is not necessary.
1
0
0
X
X
1
0
X
0
X
1
0
X
X
0
1
0
0
1
0
Table II. Address/Data Examples
Output Address Pins Enable Input Address Pins
MSB–LSB
Bit
MSB–LSB
A4
A3
A2
A1
A0
D6/E
D5
D4
D3
D2
D1
D0
Function
0
0
0
0
0
X
0
0
0
0
0
0
Lower Address/Data Range. Connect Output #00
(A[4:0] = 00000) to Input #00 (D[5:0] = 000000).
1
0
0
0
0
X
1
0
0
0
0
0
Upper Address/Data Range. Connect Output #16
(A[4:0] = 10000) to Input #32 (D[5:0] = 100000).
<Binary Output Number
*
>
1
<Binary Input Number>
Enable Output. Connect Selected Output (A[4:0] = 0
to 16) to Designated Input (D[5:0] = 0 to 32) and
Enable Output (D6 = 1).
<Binary Output Number
*
>
0
X
X
X
X
X
X
Disable Output. Disable Specified Output (D6 = 0).
1
0
0
0
1
X
<Binary Input Number>
Broadcast Connection. Connect all 17 outputs to
same designated input and set all 17 enable bits to
the value of D6. Readback is not possible with the
broadcast address.
1
0
0
1
0
X
1
0
0
0
0
1
Reserved. Any address or data code greater or equal
to these are reserved for future expansion or factory
testing.
*
The binary output number may also be the broadcast connection designator, 10001.
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