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Slave mode
Master mode
Lookup tables
Matrox Helios eA/XA has programmable lookup tables (LUTs). The LUTs can be
operated as one, two, three, or four 1024 entry 8- or 16-bit LUTs.
The LUTs are programmed using the MIL-Lite function MdigLut().
UARTs
Matrox Helios eA/XA offers four RS-232 compatible serial interfaces. Each
interface is mapped as a COM port so that it can be accessed through the Win32
API. Each interface is comprised of both a transmit port and a receive port,
permitting the interface to work in full-duplex mode. The interfaces are on the
DVI connectors.
Each interface is controlled by a Universal Asynchronous Receiver-Transmitter
(UART). Each UART features independently programmable baud rates; each
supports all standard baud rates from 300 baud up to 115200
internal 8-byte FIFO memory
interrupts in both transmit and receive operations.
General synchronization
Matrox Helios eA/XA can operate in either slave or master mode.
In slave mode, the video source provides the synchronization information to
Matrox Helios eA/XA. It can accept any one of the following:
• Synchronization signals encoded on one of the analog video signals provided to
the board.
• Horizontal and/or vertical or composite synchronization signals supplied
separately by the video source, in either TTL or LVDS format.
In master mode, Matrox Helios eA/XA generates the horizontal and/or vertical
synchronization signals, and/or a pixel clock, and supplies them to the video
source, allowing the video source to synchronize to the board.
1. For example, two 1024-entry 8-bit LUTs can map 2-tap, 10-bit data to 8-bit values.
2. Note that the maximum baud rate is highly dependant on the amount of computer
resources available.
Matrox Helios eA/XA acquisition section
buffer.
In addition, each can generate system level
65
1
2
baud. Each has an
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