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number is represented as a binary number present on the data lines having the values listed in the
channel address in Table 9.
Table 9: Channel Address Table
/Reset
D6
0
1
0
1
0
1
0
1
0
1
0
1
0
:
:
:
:
:
:
1
0
1
0
The value 0 indicates that the input is set low (for example, <0.8 V DC); the value 1 indicates that the
input is set high. For example, to select channel 9, D3 must be set high and the rest of the data lines
must be set low.
/Reset Input Line
The /Reset line overrides the data lines. A low setting on this line forces the SK switch to go to the
reset position and verify the previous channel position. /Reset must be strobed in using the /Strobe
line. Changes on the /Reset line have no effect until a high-to-low transition occurs on the /Strobe
line.
/Strobe Input Line
The /Strobe line strobes in the data on the data lines to select new channel positions. A change on
the data lines has no effect until there is a high-to-low transition on the /Strobe line. The /Reset line
also has no effect unless it is held low while the /Strobe line has a high-to-low transition.
Busy Output Line
The Busy line provides an indication of the switching mechanism state. The line is low when the
switch is idle and high when the switching mechanism is moving to another port.
Error Output Line
The Error line reports the result of the self-test operation that occurs whenever the SK switch is
reset. If the test fails, the Error line goes high and stays high until a self-test operation is evoked
again (assuming the self-test passes on the next attempt). The error most often indicates a mechan-
ical fault. For more information, contact JDS Uniphase.
D5
D4
D3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
:
:
:
:
:
:
:
:
:
0
1
0
0
1
1
Operation and Control Instructions
D2
D1
D0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
:
:
:
:
:
:
:
:
:
1
1
1
0
0
0
channel #
0 (reset)
1
2
3
4
5
6
:
:
:
24
25
31
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