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Semiconductor device and data processing system selectively operating as one of a big endian or little endian system
US9104820B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9104820-B2 |
| Application number | US-201514628059-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2015 |
| Priority date | Jun 1, 2005 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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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.
First claim
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What is claimed is: 1. A semiconductor device including a processing unit and a plurality of data terminals, the processing unit comprising: an interface circuit configured to receive an endian setting command from the plurality of data terminals; and an endian setting register configured to store the endian setting command, wherein the interface circuit is configured to switch operation between a big endian mode and a little endian mode based on a value of the endian setting…
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Physics · mapped topic
- G06F13/4221Primary
Physics · mapped topic
- G06F13/10Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9104820B2 cover?
- 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…
- Who is the assignee on this patent?
- Renesas Electronics Corp
- What technology area does this patent fall under?
- Primary CPC classification G06F13/4221. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).