Electrical computers and digital processing systems: support – Clock – pulse – or timing signal generation or analysis – Correction for skew – phase – or rate
Reexamination Certificate
2005-10-04
2005-10-04
Du, Thuan (Department: 2116)
Electrical computers and digital processing systems: support
Clock, pulse, or timing signal generation or analysis
Correction for skew, phase, or rate
C713S400000, C710S052000, C710S061000
Reexamination Certificate
active
06952791
ABSTRACT:
A method and circuit for initializing a buffer in a clock forwarded system. A buffer is configured for temporarily storing incoming data received on the clock-forwarded interface. The buffer may use a write pointer and a read pointer which may be clocked by two different clocks allowing independent write and read accesses to the buffer. In an initialization mode, a predetermined pattern of data may be written into an entry in the buffer. In one embodiment, a logic circuit may detect the predetermined pattern of data and may cause the value of the write pointer to be captured. A synchronizing circuit may synchronize an indication that the predetermined pattern of data has been detected to the clock used by the read pointer. The synchronizer circuit may then provide a initialize signal to the read pointer which stores the captured write pointer value into the read pointer. This captured write pointer value becomes the initial value of the read pointer, effectively offsetting the read pointer from the write pointer.
REFERENCES:
patent: 4419739 (1983-12-01), Blum
patent: 4866310 (1989-09-01), Ando et al.
patent: 5045725 (1991-09-01), Sasaki et al.
patent: 5224129 (1993-06-01), Lueker et al.
patent: 5357613 (1994-10-01), Cantrell et al.
patent: 5448715 (1995-09-01), Lelm et al.
patent: 5640605 (1997-06-01), Johnson et al.
patent: 5768529 (1998-06-01), Nikel
patent: 5867731 (1999-02-01), Williams et al.
patent: 5999023 (1999-12-01), Kim
patent: 6067629 (2000-05-01), Murray et al.
patent: 6098139 (2000-08-01), Giacobbe et al.
patent: 6269413 (2001-07-01), Sherlock
patent: 6370600 (2002-04-01), Hughes et al.
patent: 6414903 (2002-07-01), Keeth et al.
patent: 6434640 (2002-08-01), Keller
patent: 6519709 (2003-02-01), Kawauchi
patent: 6744834 (2004-06-01), Lo
patent: 6751235 (2004-06-01), Susnow et al.
patent: 6813275 (2004-11-01), Sharma et al.
AMD Athlon™ Processor Technical Brief, Dec. 1999, © Advanced Micro Devices, Inc., pp. 1-7.
AMD Athlon™ Processor Module Data Sheet, Jun. 2000, © Advanced Micro Devices, Inc., pp. 1-64.
LXT9785 Data Sheet, Sep. 2000, © Level One Communications, Inc., pp. 1-105.
Dobberpuhl Daniel W.
Keller James B.
Broadcom Corporation
Du Thuan
Garlick Harrison & Markison LLP
LandOfFree
Method and circuit for initializing a de-skewing buffer in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and circuit for initializing a de-skewing buffer in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit for initializing a de-skewing buffer in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3450992