Contec AI-1608GY-USB User Manual page 53

6. Functions
- Data acquisition in FIFO format
When FIFO memory is used, the oldest data is always read first.
The following sketch shows an image of data acquisition in FIFO format.
When data is acquired from the memory, the free memory space increases by that data size. When
data is acquired next, the oldest one of the existing data items is taken from the memory in the
same way.
The FIFO memory deletes data once that data is acquired.
- Data acquisition in ring format
When ring memory is used, data is read always with respect to the current input data write
position.
The following sketch shows an image of data acquisition in ring format.
The sampling count obtained is always the number of times of sampling for up to the latest data
(shaded portion below).
The larger the number of samples taken, the older the data item acquired first.
As the ring memory retains data even after that data is acquired, you can fetch the same data any
number of times.
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AIO-160802GY-USB, AI-1608GY-USB