Справочник Пользователя для National Instruments NI 6013
Chapter 3
Hardware Overview
© National Instruments Corporation
3-5
control signals, GPCTR0_UP_DOWN and GPCTR1_UP_DOWN,
are input only and do not affect the operation of the DIO lines.
are input only and do not affect the operation of the DIO lines.
Timing Signal Routing
The DAQ-STC chip provides a flexible interface for connecting timing
signals to other devices or external circuitry. The NI 6013/6014 uses the
Programmable Function Input (PFI) pins on the I/O connector to connect
the device to external circuitry. These connections are designed to enable
the NI 6013/6014 to both control and be controlled by other devices and
circuits.
signals to other devices or external circuitry. The NI 6013/6014 uses the
Programmable Function Input (PFI) pins on the I/O connector to connect
the device to external circuitry. These connections are designed to enable
the NI 6013/6014 to both control and be controlled by other devices and
circuits.
The DAQ-STC has 13 internal timing signals that can be controlled by
an external source. These timing signals can also be controlled by signals
generated internally to the DAQ-STC, and these selections are fully
software configurable. Figure 3-2 shows an example of the signal routing
multiplexer controlling the CONVERT* signal.
an external source. These timing signals can also be controlled by signals
generated internally to the DAQ-STC, and these selections are fully
software configurable. Figure 3-2 shows an example of the signal routing
multiplexer controlling the CONVERT* signal.
Figure 3-2. CONVERT* Signal Routing
Figure 3-2 shows that CONVERT* can be generated from a number
of sources, including the external signals PFI<0..9> and the internal signals
Sample Interval Counter TC and GPCTR0_OUT.
of sources, including the external signals PFI<0..9> and the internal signals
Sample Interval Counter TC and GPCTR0_OUT.
Many of these timing signals are also available on the PFI pins, as indicated
in Chapter 4,
in Chapter 4,
.
PFI<0..9>
CONVERT*
Sample Interval Counter TC
GPCTR0_OUT