Dictionary B

bus driver

A line driver used for fan-out to multiple receivers via a transmission line.

References:

JESD99B, 5/07

bus receiver

A line receiver intended to be driven from a bus.

References:

JESD99B, 5/07

busy (BY)

The output that, on some devices, signifies that some internal asynchronous operation is still in process and that the device is not available for normal functions. This signal is normally implemented so that multiple devices can be OR-tied.

References:

JESD21-C, 1/97

busy signal

Synonym for "wait signal".

References:

JESD100-B, 12/99

BW

See "block write, no mask".

References:

BW

See "bandwidth".

References:

BWNM

See "block write with new mask".

References:

BWOM

See "block write with old mask".

References:

Bxxx

A device name (e.g., BDRAM) whose first letter (B) indicates that the device has a "burst" data capability.

References:

JESD21-C#, 1/97

BY

See "busy".

References:

byte (B)

(1) A binary character string operated upon as a unit and usually shorter than a computer word. (Ref. ANSI X3.172.)

NOTE A byte is usually eight bits.

(2) The unit of storage capacity equal to eight bits.

References:

JESD100-B, 12/99

byte [word] identifier (x)

In the pin names and their definitions in section 2 of JESD21‑C, an alphabetic identifier for the byte [word] being accessed.

References:

JESD21-C, 1/97

byte-mode enable (BG)

An input that, when true, causes a word-wide device to operate in the byte mode and to present the high or low byte on a predefined data pin set. Truth tables are provided to define the details of the operation.

References:

JESD21-C, 1/97

byte-wide device

A device that has a parallel data interface of eight bits, possibly with additional bits appended to provide parity or error-detection capability.

References:

JESD21-C#, 1/97
JESD100-B, 12/99

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