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Demystifying Embedded Systems Middleware by Tammy Noergaard

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Appendix B

Embedded Systems Glossary

A

Absolute Memory Address The physical address of a specific memory cell.

Accumulator A special processor register used in arithmetic and logical operations to store an operand used in the operation, as well as the results of the operation.

Acknowledge (ACK) A signal used in bus and network ‘handshaking’ protocols as an acknowledgment of data reception from another component on the bus (on an embedded board for bus handshaking) or from another embedded system via some networking transmission medium (for network handshaking).

Active High Where a logic value of ‘1’ is a higher voltage than a logic value of ‘0’ in a circuit.

Active Low Where a logic value of ‘0’ is a higher voltage than a logic value of ‘1’ ...

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