Chapter 3
Hardware Overview
3-10
ni.com
Digital I/O
The NI 6052E contains eight lines of DIO for general-purpose use. Each
line is software programmable for either input or output. At system startup
and reset, the DIO ports are all high-impedance.
The hardware up/down control for general-purpose counters 0 and 1 are
connected onboard to DIO6 and DIO7, respectively. Thus, you can use
DIO6 and DIO7 to control the counters. The up/down control signals,
GPCTR0_UP_DOWN and GPCTR1_UP_DOWN, are input-only and do
not affect the operation of the DIO lines.
Timing Signal Routing
The DAQ-STC provides a flexible interface for connecting timing signals
to other devices or external circuitry. The NI 6052E uses the RTSI bus
to interconnect timing signals between devices and 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 device
to both control and be controlled by other devices and circuits.
The DAQ-STC has 13 internal timing signals you can control by an external
source. These timing signals can also be controlled by signals internally
generated to the DAQ-STC, and these selections are software configurable.
Figure 3-9 shows an example of the signal routing multiplexer controlling
the CONVERT* signal.
