AD8150 Analog Devices, AD8150 Datasheet - Page 12

• Manufacturer Part Number: AD8150
• Description: Xstream 33 17, 1.5 Gbps Digital Crosspoint Switch
• Manufacturer: Analog Devices

AD8150
Control Interface Truth Tables
The following are truth tables for the control interface.
Reset
0
1
1
1
1
1
A4
0
1
<Binary Output Number*>
<Binary Output Number*>
1
1
*The binary output number may also be the broadcast connection designator, 10001X.
Output Address Pins
A3
0
0
0
0
MSB–LSB
CS
X
1
0
0
0
0
A2
0
0
0
0
Control Pins
WE
X
X
0
X
X
0
A1
0
0
0
1
0
0
1
0
A0
RE
X
X
X
0
X
1
D6/E
X
X
1
0
X
X
Enable
Bit
Update
X
X
X
X
0
0
D5
0
1
X
1
<Binary Input Number>
<Binary Input Number>
Input Address Pins
D4
0
0
X
0
Function
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.
MSB-LSB
Table II. Address/Data Examples
Table I. Basic Control Functions
D3
0
0
X
0
D2
0
0
X
0
–12–
D1
0
0
X
0
D0
0
0
X
1
Function
Lower Address/Data Range. Connect Output #00
(A[4:0] = 00000) to Input #00 (D[5:0] = 000000).
Upper Address/Data Range. Connect Output #16
(A[4:0] = 10000) to Input #32 (D[5:0] = 100000).
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).
Disable Output. Disable Specified Output (D6 = 0).
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.
Reserved. Any address or data code greater or equal
to these are reserved for future expansion or factory
testing.
REV. 0