Specifications

Matrox Solios eA/XA acquisition section 83
• A clock based on another timer output of the same PSG.
• A clock based on an external pixel clock signal.
• A clock based on the HSYNC or VSYNC signal generated by the PSG.
To set up a timer, use the MIL-Lite function MdigControl() with M_TIMER...
Set the clock source of a timer using MdigControl() with
M_TIMER_CLOCK_SOURCE. To transmit the output of a timer, use
MdigControl() with M_IO_SOURCE
*
+ M_AUX_IOn set to M_TIMERm.
Trigger signals
The board accepts trigger input signals, which allow acquisition to be
synchronized with external events. Each PSG accepts two external trigger input
signals: one TTL or LVTTL trigger input and another trigger input that passes
through an opto-coupler, a device that protects the board from outside surges. For
each PSG, you can also program two path-independent auxiliary signals as trigger
input signals; these can be received in LVDS, TTL, or LVTTL.
When received in TTL format directly, the signal must have a maximum
amplitude of 5 V; when received in LVTTL format directly, the signal must have
a maximum amplitude of 3.3 V. A signal over 2 V is considered high, while
anything less than 0.8 V is considered low; the transition of 0.8 V to 2 V is
considered to be the rising edge.
If using the trigger to start acquisition, the trigger signal’s pulse width must be
greater than two pixels; if using the trigger to start the timer output, the trigger
signal’s pulse width must be greater than two clock periods of the timer. To
determine the timer period, take the inverse of the pixel or timer’s clock frequency,
respectively. For example, if the pixel frequency is 12.27 MHz, the minimum pulse
width is 2 x 1/12.27 MHz (approximately 163 nsec).
A trigger signal connected to external I/O connector 1 of the adapter board, passes
through an opto-coupler. The voltage difference across the positive and negative
components of the signal must be between 3.15 V and 6.45 V for logic high, and
between -5.0 V and 0.8 V for logic low.
*. As of MIL 10.