ADLINK Technology PCI-8124, User Manual, Page: 36 / 85

Operation Theory 27
Inside the PCI-8124, all the position comparison and mapping
tasks will be executed within the FPGA. The functional block is as
follows:
The FIFO will automatically load the comparing points into 32-bit
comparator. The comparator will compare the data from counter
and FIFO individually. Due to the mapping mechanism, several
combinations are provided for users to continuously send out the
trigger pulse with isolation or non-isolation channels. Latch signal
can let users retain and retrieve the position data at very short
time.
Linear function will automatically load the next comparing points
with a fixed incremental value into 32-bit comparator. Just like
FIFO’s purpose, the new comparing points will be loaded once the
previous comparing point is compared and pulse is triggered.