公开(公告)号：US20040230723A1

公开(公告)日：2004-11-18

申请号：US10743564

申请日：2003-12-22

Applicant: STMicroelectronics S.A.

Inventor： Nicolas Rougnon-Glasson

IPC: H04L012/56

CPC classification number: G06F5/10 ,  G06F5/06 ,  H04L7/005 ,  H04L7/02

Abstract: Device for transferring data between two asynchronous systems communicating via a FIFO memory. The first system comprises a write pointer register and the second system comprises a read pointer register to the FIFO. Each pointer register is associated with a primary shadow register and a secondary shadow register. The primary shadow register is located in the same sub-assembly as the pointer register with which it is associated, and episodically receives a copy of this pointer register. The secondary shadow register is located in the other sub-assembly, and episodically receives a copy of the primary shadow register. Thus, each system has its own pointer register, its associated primary shadow register, and the secondary shadow register associated with the pointer register of the other system

Abstract translation: 用于在通过FIFO存储器通信的两个异步系统之间传送数据的设备。 第一系统包括写指针寄存器，第二系统包括到FIFO的读指针寄存器。 每个指针寄存器与主影子寄存器和次级影子寄存器相关联。 主影子寄存器位于与其相关联的指针寄存器的相同子组件中，并且偶然地接收该指针寄存器的副本。 次级影子寄存器位于另一个子组件中，并且偶然地接收主影子寄存器的副本。 因此，每个系统都有自己的指针寄存器，其相关联的主影子寄存器和与其他系统的指针寄存器相关联的次级影子寄存器