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Appendix D External GPIO Configuration Matrix
Function
# - Name
Description
Function #10 configures the connector for output mode.
ICR
10 – ICR_OUT
Selecting ICR function directs the Osprey device to drive the
GPIO connector output with its Incoming Count Rate pulses.
The ICR pulses are derived from the raw PHA energy events
processed by the Fast Discriminator hardware and are not
affected by the LLD/ULD window settings.
The approximate ICR count rate can also be read by client
applications through the Input_CountRate parameter.
Multiple GPIO connectors can be configured for the ICR
output function to extend the same output to multiple
connectors
Functions #11 through #16 configures the respective GPIO
connector for output
SCA1
11 – SCA1_OUT
SCA2
12 – SCA2_OUT
SCA3
13 – SCA3_OUT
SCA4
14 – SCA4_OUT
SCA5
15 – SCA5_OUT
SCA6
16 – SCA6_OUT
By selecting SCAn function on a GPIO connector, pulses from
energy events that falls within an SCA's energy window and
counted by the internal SCA counter, are also exposed external
to the device through the designated GPIO connector. Selecting
SCAn function on a GPIO connector makes the same pulses
counted by the SCA counter available on that GPIO connector.
The internal SCA counters can be read by the GetSCAbuffer
command. The SCA energy windows can be set through the
PutSCA definitions command and read through the GetSCA
definitions command.
Multiple GPIO connectors can be configured for other SCAn
functions, or to the same SCAn function. There are no
restrictions.
These functions are not supported in Genie 2000.
Function #17 configures the connector for input mode.
The PHA EXT START/STOP IN function directs the GPIO
connector to accept an external user-supplied signal to
synchronize the start or stop of the Osprey's PHA acquisition.
The Osprey supports both pulsed and level modes of external
acquisition control.
PHA EXT
START/STOP IN
17 – PHAEXTSS_IN
The PHA input's external start/stop logic must be enabled and
configured for either pulsed (DSA2K) or level (Lynx) control
mode through the Input_PhaExternalControlMode parameter.
The pulsed mode behavior must be setup through the
Input_PhaExternalControl parameter, and the polarity through
the Input_PhaExternalControlPolarity parameter.
The PHA EXT START/STOP IN function is limited to a single
GPIO connector.
Function #18 configures the connector for output mode.
PHA EXT
START/STOP OUT
100
18 –
PHAEXTSS_OUT
The PHA EXT START/STOP OUT function directs the Osprey
device to drive the GPIO connector logic output with either a
pulse or a level when the PHA Input acquisition status changes
state.
Osprey Universal Digital MCA Tube Base