Contec DIO-32DM3-PE, User Manual

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4. Function
DIO-32DM3-PE
43
Sampling function
Sampling control
DIO-32DM3-PE can obtain sampling data at fixed intervals using a sampling clock. The table below
lists the sampling clock, sampling start trigger, and sampling stop trigger factors.
Table 4.1. Sampling clock, starting trigger, stopping trigger
Item Factor Contents
Sampling clock
Internal clock
Internal clock (20ns to 21s)
5ns unit
External clock
Fall of external clock input (EXTCLK0)
(Maximum frequency response: 20 MHz)
Handshake Fall of handshake signal (EXTREQ0)
SC connector
Clock input from synchronization control connector
(Maximum frequency response: 5 MHz)
Sampling
starting trigger
Software Software command
Rise of external signal Rise of external start signal (EXTSTART0)
Fall of external signal Fall of external start signal (EXTSTART0)
Pattern match When matched with the specified input pattern
SC connector Start signal from synchronization control connector
Sampling
stopping trigger
Software Software command
Rise of external signal Rise of external stop signal (EXTSTOP0)
Fall of external signal Fall of external stop signal (EXTSTOP0)
Specified number of items Termination when the specified number of items is reached
SC connector
Stop signal from synchronization control connector
Bus master transfer error When FIFO buffer becomes full
- The product obtains the first sampling data at the falling edge of the sampling clock signal after
input of the sampling start trigger. From then on, the product obtains sampling data in
synchronization with the sampling clock signal.
- The product stops sampling upon input of the sampling stop trigger. The product does not obtain
sampling data when and after sampling is stopped.