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Procedure 1. Reset and initialize the timebase processor.
A. Write the following data to the registers indicated. Except for the
abort and arm immediate register (base +41
16
), these registers must
not be set to any other values; therefore, they are not listed in the
"Register Descriptions" section.
write any 8-bit value to base + 41
16
write any 8-bit value to base + 5F
16
write a value of 1 to base + 65
16
write a value of 5 to base + 67
16
write a value of 0 to base + 69
16
write a value of 0 to base + 6B
16
write a value of 0 to base + 7D
16
write a value of 0 to base + 7F
16
2. Set the Trigger count.
The number of readings the digitizer takes each time it is armed is set with
the pre-arm and post-arm reading count registers listed below.
• Pre-arm reading count registers
base + 73
16
and base +75
16
• Post-arm reading count registers
base + 77
16
and base + 7B
16
When taking (x) pre-arm and (y) post-arm readings, and (x) and (y) are the
intended number of each set of readings, the count loaded into the pre-arm
reading count registers is x-2. The count loaded into the post-arm reading
count registers is y-6. When taking post-arm readings only, the pre-arm
count is 1 and the post-arm count is y-3.
382 Register Programming Appendix C