Diamond Systems Pyxis-MM Manual del usuario - Página 9

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6. JUMPER SETTINGS

J4 3-pin landline modem power input select (1x3 pin header)
1
2
3
Jumper across pins 1 and 2 for +5VDC commercial grade modem module.
Jumper across pins 2 and 3 for +3.3VDC industrial grade modem module.
CAUTION: Always check the Multitech modem modules data sheet prior to setting this
jumper as the wrong input voltage can damage the modem!
J6 6 pin base address selection (2x3 pin header)
A
B
IN
IN
*OUT
IN
IN
OUT
OUT
OUT
IN
IN
OUT
IN
IN
OUT
OUT
OUT
J8 22 pin Serial port 1 IRQ selection (2x11 pin header)
J9 22 pin Serial port 2 IRQ selection (2x11 pin header)
Allows IRQ selection for both serial ports. Set a 2mm jumper vertically on the desired IRQ as noted on
the silkscreen of the Pyxis board. If sharing the same IRQ for both serial ports only one of the 'R'
jumpers needs to be installed. The 'R' jumper will add a 1K ohm resistor from the IRQ line to ground
which allows for tri-stated (inactive) IRQ's to be held low. If both 'R' jumpers are installed and the IRQ
selected is the same for both serial ports then the resistors will be in parallel creating a 500 ohm
resistance and will load the IRQ line too much causing it not to function.
+5VDC
POWER In to LL Modem
+3.3VDC
C
Port
1
IN
3F8
IN
3E8
IN
380
IN
240
OUT
100
OUT
120
OUT
140
OUT
160
765300 - Pyxis User Manual
Port
Interrupt
2
Status
2F8
220
2E8
220
388
224
248
224
108
240
128
244
148
248
168
24C
Page 9