Filter
Top Products
6. Load the arm count and send the initiate pulse.
A. Load the arm count and initialize the trigger counters by writing
(any value) to the arm count latch register (base + 59
16
) three
times.
B. Initiate the timebase processor by writing any value to the
timebase initiation register (base +45
16
).
Note The memory address registers (base +23
16
to base +27
16
) are useful for
determining if the digitizer has been re-initiated by indicating the number of
readings that have been taken. For example, if 100 readings are to be taken
when the digitizer is re-initiated, the memory address registers point to the
location where the 100th reading is to be stored.
Retrieving Data from Memory
This section explains how to use register reads/writes to retrieve readings
from memory and transfer them over the VME (VXI data transfer) bus.
The procedure given in this section for reading data from memory assumes
that data is stored under the following digitizer configuration restrictions:
• a single burst of post-arm readings
Initializing Digitizer
Memory to Retrieve
Data
As with storing data in memory, digitizer memory must be initialized before
data is retrieved from memory. The registers used in the data retrieval
process are:
• traffic register
base + 02
16
• pulse register
base + 08
16
• memory control register
base + 21
16
• terminal address register
base + 2B
16
• base address registers
base + 2D
16
and base + 2F
16
• data register
base + 0C
16
Appendix C Register Programming 385