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Control Information for the 1260-36
This card has a unique control scheme that is NOT shared by any other 1260 series relay module. This card
comprises 12 1x8 MUXes. There is a total of 6 control registers on the module. Each byte controls 2 1x8
MUXes.
The control bit assignment for each MUX is shown below:
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
CODD
CEVEN
ODD2
ODD1
ODD0
EVEN2
EVEN1
EVEN0
Each MUX is controlled with one control bit and 3 select bits:
CEVEN
Control Bit for EVEN MUXes (0X, 2X, 4X, 6X, 8X, 10X, X = 0 to 7)
EVEN2
EVEN1
Select Bits for EVEN MUXes
EVEN0
CODD
Control Bit for ODD Muxes (1X,3X,5X,7X,9X,11X, X = 0 to 7)
ODD2
ODD1
Select Bits for ODD MUXes
ODD0
When the Control Bit for a MUX is 0, no channels in that MUX are closed. In this case, the value of
the 3 Select Bits for the MUX do not affect the operation of the MUX.
When the Control bit is 1, the channel closed is selected by the Select Bits
0
Channel 0 of MUX is closed
1
Channel 1 of MUX is closed
2
Channel 2 of MUX is closed
3
Channel 3 of MUX is closed
4
Channel 4 of MUX is closed
5
Channel 5 of MUX is closed
6
Channel 6 of MUX is closed
7
Channel 7 of MUX is closed
So the following patterns control the ODD and EVEN MUXes within each control register:
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