Glossary - Matrox Indio Installation And Hardware Reference

62 Appendix A: Glossary

Glossary

• Auxiliary I/O.
Auxiliary input/output. Non-video digital signals that can support one or more
functionalities depending on the auxiliary signal (for example, trigger input or
timer output).
• Bandwidth.
A term describing the capacity to transfer data. Greater bandwidth is needed to
sustain a higher transfer rate. Greater bandwidth can be achieved, for example, by
using a wider bus or by increasing the clock frequency at which an interface or a
processing core operates (for example, increasing the DDR3 SDRAM clock
frequency).
• DDR3 SDRAM.
Double-data-rate type 3 synchronous dynamic random-access memory. A type of
general purpose consumer RAM. DDR3 SDRAM allows for data transfer at very
high speeds, which is important for I/O-bound functions. This type of memory
is inexpensive, high density, and very efficient as long as the data is accessed
contiguously.
• Latency.
The time from when a command is sent to when its operation is started.
• PCIe.
Peripheral Component Interconnect Express. The standard used for the computer
bus that acts as an interface between hardware devices, such as Matrox Indio, and
your computer.
• Payload.
The amount of data transmitted to the PCIe bus within each data packet. PCIe
supports payload sizes of 128, 256, 512, 1024, 2048, and 4096 bytes.