Semiconductor device and data processing system selectively...

Details Semiconductor device and data processing system selectively... Semiconductor device and data processing system selectively...

2011-04-26

2011-04-26

Tsai, Henry W (Department: 2184)

Electrical computers and digital processing systems: processing

Instruction alignment

C712S200000, C712S300000, C710S003000, C710S062000, C710S071000

Reexamination Certificate

active

07934077

ABSTRACT:
The present invention is to provide a semiconductor device that can correctly switch endians on the outside even if the endian of a parallel interface is not recognized on the outside. The semiconductor device includes a switching circuit and a first register. The switching circuit switches between whether a parallel interface with the outside is to be used as a big endian or a little endian. A first register holds control data of the switching circuit. The switching circuit regards the parallel interface as the little endian when first predetermined control information, that is unchanged in the values of specific bit positions even if its high-order and low-order bit positions are transposed, is supplied to the first register, and regards the parallel interface as the big endian when second predetermined control information, that is unchanged in the values of specific bit positions even if its high-order and low-order bit positions are transposed, is supplied to the first register. Whatever the endian setting status, the control information can be correctly inputted without being influenced by the endian setting status.

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