Motorola Corporation

Freescale Semiconductor,inc.

Richard J Swindlehurst

Daniel R Cronin, Iii

Ricardo Fernandez

Douglas W Schucker

Joel Feldman

A symmetric key stream processorthat encrypts and decrypts text in accordance with the RC4 algorithm has a main processing blockand a host interface. The main processing blockincludes an Sbox memoryimplemented with a synchronous dual-port RAM and an encryption logic blockwith a finite state machine. The dual port memory architecture is used for efficiency during permutation and message processing.

Key stream cipher device

In operation, a standard cell library having diode place-holders (,) associated with standard cell inputs (,) is used to design a standard cell-based semiconductor device. Each standard cell in the standard cell-based semiconductor device is analyzed to determine if its standard cell inputs (,) will be connected to a conductive element (,) during processing that can accumulate a charge. When a conductive element (,) that can accumulate charge is identified, the diode place-holder (,) associated with its standard cell input (,) is replaced with a diode (,).

Semiconductor device using diode place-holders and method of manufacture thereof

In operation, a standard cell library having diode place-holders (16) associated with standard cell inputs (12) is used to design a standard cell-based semiconductor device. Each standard cell in the standard cell-based semiconductor device is analyzed to determine if its standard cell inputs (12) will be connected to a conductive element (18) during processing that can accumulate a charge. When a conductive element (18) that can accumulate charge is identified, the diode place-holder (16) associated with its standard cell input (12) is replaced with a diode (16).

Semiconductor device using diode place-holders and method of manufacture

A block architected integrated circuit having a predetermined power and signal grid structures is provided. The integrated circuit includes a plurality of function blocks such as firm function blocks, standard cell logic blocks, and gate array logic blocks which are all designed according to the power and signal grid structures of the integrated circuit and from standard library elements of the base cell array. These function blocks have full floating capability with respect to the granularity of the power and signal grid structures. The integrated circuit also includes one or more hard function blocks which are not designed according to the power or signal grid structures of the integrated circuit. Further, the integrated circuit may also include one or more blocks which are designed from a different technology than the base cell array of the integrated circuit and, thus are also not designed according to the power or signal grid structures of the integrated circuit. As a result, these blocks must be adapted to readily fit within the power and signal grid structures of the integrated circuit. However, once adapted, these blocks also have full floating capability with respect to the granularity of the power and signal grid structures.

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Phoenix, AZ, United States of America

Richard J Swindlehurst