JYTEK USB-62401, Руководство пользователя

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Operation 37
3.5.2 Continuous Acquisition Mode
Differs from software polling mode only in the generation of block data
in continuous acquisition mode without the need to consider data over -
writing or acquiring repeat data in software polling mode. This mode is
suitable for when continuous data is to be acquired in a fixed and pre -
cise time interval. Please note the data buffer size must be a multiple of
128 in continuous acquisition mode. Please refer to UD-DASK function
reference for details of corresponding software API instruction.
3.6 Programmable Function I/O
The USB-62401 supports powerful programmable I/O function provided
by an FPGA chip, configurable as TTL DI/DO, 32-bit timer/counters, and
PWM output. These signals are single-ended and 5V TTL-compliant.
3.6.1 TTL DI/DO
Programmable function I/O can be used as static TTL-compliant 4-CH
digital input and 2-CH digital output. The I/O lines can be updated by
software polling, with sample and update rate fully controlled by soft -
ware timing.
Table 3-3: TTL Digital I/O Pin Definition
Pin Function Pin Function
20 GPO0 40 GPO1
19 GPI1 39 GPI3
18 GPI0 38 GPI2
17 NC 37 DGND