PCI30FG User Manual
Eagle Technology © Copyright 2002 14
In differential mode, all signal inputs to
the PCI30FG must be referred to ground.
This can be done by connecting a 1 to 10
kΣ
ΣΣ
Σ resistor from the low end of each input
to ground.
Analog Output
The analog outputs come with sense lines and it is important to make sure
that they are connected to the correct channel. If left unconnected the output
will simple float at +10V or –10V. The analog output range is ±10V and is fully
software configurable. The EDR Enhanced driver support auto ranging and
will always select the range with the best possible resolution. For normal
operation simply connect SENSE0 to DAC0.
Digital Input/Output
The PCI30FG has got 3x8-bit digital I/O ports that are fully configurable as
inputs or outputs. The digital I/O uses a chip that is fully compatible with the
Intel 8255 programmable peripheral interface. Make sure not to overload the
PPI because it will cause serious damage and will need to be repaired.
Counter-Timer
There are six counter-timers on the PCI30FG of which four are available for
the user. Two are used for A/D timing. The timers are compatible with the Intel
8254 counter-timer device. The 8254 counter-timer datasheets can be used
as reference for configuring the counter-timer sub-system.
There is no onboard clock for the user counter-timers and an external clock is
required.
OVERLOADING ANY DIGITAL I/O LINE
WILL CAUSE SERIOUS DAMAGE TO THE
DIGITAL I/O CHIP. OPERATING OUTSIDE
THE TTL VOLTAGE RANGE WILL CAUSE
PERMANENT DAMAGE TO THE DIGITAL
I/O CONTROL CIRCUIT.
