OPTO 22 PCI-AC51, User Manual

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APPENDIX D: PCI-AC51 TECHNICAL REFERENCE
PCI-AC51 User’s Guide
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Default Power-Up State of Reset Line
When a computer with a PCI-AC51 card installed has just been powered up, bit 0 of the reset control
register will be in its default power-up condition, which is a bit value of 0. This will drive the reset
line HIGH and turn LED 1 (reset line) ON.
Reset Configuration of Brains When Using PamScan
One of the parameters you must choose when using the PamScan utility is the reset level of the
brains in your system. Set the option in PamScan to match how your Pamux brains are configured.
PamScan needs to know the brain configuration so that it can determine whether to set the reset
line HIGH or LOW in order to take the system out of reset. This allows PamScan to configure and
control the brains and output modules.
Testing
The following table shows the results of using each of the possible reset settings on the brains and
in the PamScan utility. After choosing the reset setting in PamScan, click the Connect button to
establish communication with the PCI-AC51 card and brains.
DIP Switches
The PCI-AC51 has six DIP switches (the DS1 bank). The DIP switches may be modified on a system
that is powered; however, the applications that use the PCI-AC51 must be stopped. A switch in the
ON position will read as a zero and OFF will read as a one.
Switches 1 through 4 are provided for custom implementation. One common use will be for
identifying certain cards in a multiple card system. The settings of these switches do not affect the
Pamux operation.
Switches 5 and 6 are used to set the Pamux strobe duration. Under most conditions, these switches
do not have to be changed.
*The 2.7 μS setting is the legacy AC28 (K Revision) Pamux bus timing. Factory default.
Jumper 7 Setting
on Brains
Pam Scan
Configuration
Reset Line
Voltage
State of
Reset Line
Status
Set "Active Low" Choose "Active Low" 3.48 VDC HIGH Brains allow control of outputs
Set "Active Low" Choose "Active High" 0 VDC LOW Brains are reset
Set "Active High" Choose "Active Low" 3.48 VDC HIGH Brains are reset
Set "Active High" Choose "Active High" 0 VDC LOW Brains allow control of outputs
S5 (Switch) Strobe Duration
On 2.7 μ S*
Off 3.3 μ S
S6 (Switch) Strobe Duration
On High Latency Mode**
Off Low Latency Mode