SERIES AP48X ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 7 -
http://www.acromag.com
- 7 -
https://www.acromag.com
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Quadrature Position Measurement
–
Three input signals can be
used to determine bi-direction motion. The sequence of logic high
pulses for two input signals, A and B, indicate direction and a third
signal (index) is used to initialize the counter. X1, X2, and X4
decoding is also implemented. X1 decoding executes one count per
duty cycle of the A and B signals, while X2, and X4 execute two and
four counts per duty cycle respectively.
•
Pulse Width Modulation
–
Each counter can be programmed for
pulse width modulation. The duration of the logic high and low
levels of the output signal can be independently controlled. An
external gate signal can also be used to start/stop generation of the
output signal.
•
Watchdog Timer
–
Each counter can be configured as a countdown
timer for implementation as a watchdog timer. A gate-off signal is
available for use to stop the count down operation. Interrupt
generation upon a countdown to zero condition is available.
•
Event Counter
–
Each counter can be configured to count input
pulses or events. A gate-off signal is provided to control count-up
or count down with each event. Interrupt generation upon
programmed count condition is available.
•
Frequency Measurement
–
Each counter can be configured to
count how many active edges are received during a period defined
by an external count enable signal. An interrupt can be generated
upon measurement complete.
•
Pulse-Width or Period Measurement
–
Each counter can be
configured to measure pulse-width or waveform period. In
addition, an interrupt can be generated upon measurement
complete.
•
One-Shot and Repetitive One-Shot
–
A one-shot pulse waveform
may also be generated by each counter. The duration of the pulse
and the delay until the pulse goes active is user programmable. A
repetitive one-shot can be initiated with repetitive trigger pulses.
•
Programmable Interface Polarity
–
The polarities of the counter’s
external trigger, input, and output pins are programmable for active
high or low operation. These counter control signals are available
through the board’s field connector
.
•
Internal or External Triggering
–
A software or hardware trigger is
selectable to initiate quadrature position measurement, pulse width
modulation, watchdog countdown, event counting, frequency
measurement, pulse-width measurement, period measurement, or
one shot.