Teledyne LeCroy PC_AT 200 - Manual (Page 7)

5
SOFTWARE COMMANDS
The On-Off power control and the signal isolation to and from the bus can be
controlled with software. There are two registers on the Active Extenders to
control these functions. The base address for these registers is set at 200 at
the factory. The definition of these registers are as explained below. Please
note that the output of these registers are set to FF after the system is
powered-on each time.
You may change the base address if this address is conflicting with another
module in the system. The jumper illustration below give examples of few other
addresses.
Address Data, D7-D0 Function
0X201 1XXX XXXX TURN THE POWER OFF
0X201 0XXX XXXX TURN THE POWER ON
0X201 0XXX XXX0 POWER ON AND SWITCH 9 (U9) ACTIVE
0X201 0XXX XX0X POWER ON AND SWITCH 10 (U10) ACTIVE
0X201 0XXX XX00 POWER ON AND SWITCH 9 AND 10 ON
0X200 XXXX XXX0 SWITCH 1 ON
0X200 XXXX XX0X SWITCH 2 ON
0X200 0XXX XXXX SWITCH 8 ON
0X200 0000 0000 SWITCHES 1-8 ALL ON
NOTE: For the switches to be ON, the power has to be ON first or
simultaneously.
ADDRESS SELECTION EXAMPLE
A11 A10 A9 A8 A7 A6 A5 A4 DECIMAL HEX
0 0 1 0 0 0 0 0 512 200
0 0 1 0 0 0 1 0 544 220
0 0 1 1 0 0 0 0 768 300
Existence of Jumpers on the board represent 0 and no jumper represents 1.
The jumpers, JX, are located below RP2 and please note that they are not in
descending order as shown here, but are marked correctly.
NOTE: For the software command to work, the corresponding switches that are
being controlled must be in the OFF (open) positions.