High-speed digital-I/O ports: The ME-5100 has two 16
-
bit digi-
tal-I/O ports and a number of control lines. When operating in
single mode, the two ports can be configured, independently of
one another, as input or output. The direction of the ports is
defined in software. Immediately after powering up, all the
ports are configured as inputs. When operating in streaming
mode, the direction of the ports is specified by hardware: port
A is the input port, while port B is the output port.
Frequency counter: The concept of the “configurable subde-
vices” allows subdevice 0 to be employed as a frequency coun-
ter. Four independent channels are available for measuring the
frequency and duty cycle of rectangular signals (max. 5.5
MHz).
Pulse generator: The concept of the “configurable subdevices”
allows subdevice 1 to be employed as a rectangular wave gener-
ator. Four independent channels are available for the output of
a periodic, rectangular signal at up to 5.5
MHz with a variable
duty cycle.
Signal level 3.3/5 V: the signal level of all the digital inputs/out-
puts and of the control lines can be switched together between
3.3
V and 5
V, depending on the external circuitry.
For optimum signal matching, you are able to activate, via soft-
ware, an active 110
Ω
termination at the digital inputs/outputs
of each port.
The DATA_VALID and L_CLK signals are available for synchroni-
zation with the external circuitry. The DATA_VALID pin indi-
cates the validity of the data during output in streaming mode
operation, while the 66 MHz system clock can be accessed at
the L-CLK pin.
Bit-pattern detection: The bit-pattern at the digital inputs can
be monitored if required. Depending on the configuration, an in-
terrupt can be triggered in response to a change in the bit-pat-
tern. In streaming mode operation, the bit-pattern detection
can also be used to control the input/output operation, depend-
ing on the selected operation mode (not using interrupts).
Thanks to the DMA architecture, the data can be transferred very
quickly between the PC’s working memory and the board. In
streaming mode, an input/output rate of up to 30
MS/s, in which all
the ports must participate, is possible. (See also Table 3 on page
22). The actual transmission rate will depend on the operating
mode and the configuration of your computer.
Depending on requirements, you can select from the following oper-
ating modes:
Summary of Contents for ME-5100 cPCI
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