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Chapter 3
Hardware Overview
3-18
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Digital I/O
The AT E Series devices contain eight lines of DIO for general-purpose
use. You can individually configure each line through software for either
input or output. The AT-MIO-16DE-10 has 24 additional DIO lines,
configured as three 8-bit ports: PA<0..7>, PB<0..7>, and PC<0..7>. You
can configure each port for both input and output in various combinations,
with some handshaking capabilities. At system startup and reset, the digital
I/O ports are all high impedance.
use. You can individually configure each line through software for either
input or output. The AT-MIO-16DE-10 has 24 additional DIO lines,
configured as three 8-bit ports: PA<0..7>, PB<0..7>, and PC<0..7>. You
can configure each port for both input and output in various combinations,
with some handshaking capabilities. At system startup and reset, the digital
I/O 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 general-purpose counters. The up/down
control signals are input only and do not affect the operation of the
DIO lines.
connected onboard to DIO6 and DIO7, respectively. Thus, you can use
DIO6 and DIO7 to control the general-purpose counters. The up/down
control signals are input only and do not affect the operation of the
DIO lines.
Timing Signal Routing
The DAQ-STC provides a very flexible interface for connecting timing
signals to other devices or external circuitry. The AT E Series device uses
the RTSI bus for interconnecting timing signals between devices and
the Programmable Function Input (PFI) pins on the I/O connector for
connecting to external circuitry. These connections are designed to enable
the AT E Series device to both control and be controlled by other devices
and circuits.
signals to other devices or external circuitry. The AT E Series device uses
the RTSI bus for interconnecting timing signals between devices and
the Programmable Function Input (PFI) pins on the I/O connector for
connecting to external circuitry. These connections are designed to enable
the AT E Series device to both control and be controlled by other devices
and circuits.
There are a total of 13 timing signals internal to the DAQ-STC 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. For example, the signal routing
multiplexer for controlling the CONVERT* signal is shown in Figure 3-14.
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. For example, the signal routing
multiplexer for controlling the CONVERT* signal is shown in Figure 3-14.