Bi-directional packing data device enabling forward/reverse bit

Details Bi-directional packing data device enabling forward/reverse bit Bi-directional packing data device enabling forward/reverse bit

1998-05-15

2000-09-26

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

710 5, 710 57, 710 65, 712300, G06F 1300

Patent

active

061254061

ABSTRACT:
The invention provides a data packing device that packs selected bits of input data into an output data. The data packing device includes a data positioner, an output latch, and output selector and a controller. The data positioner positions the bits of the input data relative to bit positions of the output latch so that the selected bits from the input data may be packed. The output latch includes a first portion and a second portion which are packed alternately in a ping-pong manner. The controller is implemented using state machines where one state machine is allocated for packing a specific number of bits selected from the input data into the output data. Thus, the controller includes a number of state machines where each state machine corresponds to one selected number of bits of the input data that may be selected to be packed. For input data in bytes, the controller includes eight state machines.

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