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Glossary

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Term Description
BCD Binary-Coded Decimal - The encoding of decimal numbers as four-bit binary values from 00002 for 0, to 10012 for 9. BCD uses only 10 of the 16 4-bit combinations.
Binary A numbering system that allows for only two states, usually 1 and 0.
Bit Wise An operation, usually between two bytes or words, in which corresponding bits take part in an operation.
Blocking Diode A diode, also called an isolation diode, that stops, or blocks, current from flowing through a circuit. Typically used in a battery circuit to prevent the reverse biasing of a battery by a more positive power supply.
Boolean Logic A form of mathematics named after George Boole (1815-1864) who devised formal expressions for AND, OR, and INVERT operations.
Buffer An output device that operates high-current or high-voltage devices. Some manufacturers produce drivers specifically to control devices such as stepper motors or displays. See: Driver.
Buffered A signal that has passed through a buffer. See: Buffer.
Bus A group of related electrical signals. 1. A control bus, an address, bus, a data bus, and so on. Some buses carry specific names, such as PCI Bus and Universal Serial Bus (USB). 2. A group of conductors that distribute power.
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