Global Patent Index - EP 1257917 A1

EP 1257917 A1 2002-11-20 - GLOBAL BUS SYNCHRONOUS TRANSACTION ACKNOWLEDGE WITH NONRESPONSE DETECTION

Title (en)

GLOBAL BUS SYNCHRONOUS TRANSACTION ACKNOWLEDGE WITH NONRESPONSE DETECTION

Title (de)

GLOBALE BUS-SYNCHRONE BESTÄTIGUNG EINER TRANSAKTION MIT ERKENNUNG DES FEHLERS EINER ANTWORT

Title (fr)

ACCUSE DE RECEPTION DE TRANSACTION SYNCHRONE DE BUS GLOBAL AVEC DETECTION DE NON-REPONSE

Publication

EP 1257917 A1 (EN)

Application

EP 00923146 A

Priority

  • US 0009155 W
  • US 12822299 P

Abstract (en)

[origin: WO0060462A1] An integrated multi-processor system with clusters (130, 131, 132, 133) of processors (25) on a high speed split transaction bus (16) uses a transaction acknowledge (TACK), by a target device in response to receiving a request from a master device on the bus. The master and target devices connect to the bus via a global bus interface (17; 31B, 33B) with FIFO registers (31A, 33A) acting as buffers, and the target interface includes a TACK generator (Fig. 6) that flips the state of the global bus' TACK line (TACK#) upon determining that a broadcast request is addressed to its target device. A bus idle default device (BIDD) (18; Fig. 8) generates a TACK signal when no device is on the bus, and also detects the absence of any TACK response (165) by monitoring the state of the TACK line, thereby indicating that a master device attempted to address a nonexistent target device. The BIDD then generates a dummy response for the requesting master device with data flags set to invalid data.

IPC 1-7 (main, further and additional classification)

G06F 11/00; G06F 11/07; G06F 11/16; G06F 11/20; G06F 13/40; H03K 19/00; H03K 19/007

IPC 8 full level (invention and additional information)

G06F 13/36 (2006.01); G06F 13/40 (2006.01); G06F 11/00 (2006.01)

CPC (invention and additional information)

G06F 13/4068 (2013.01); G06F 11/004 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 0060462 A1 20001012; EP 1257917 A1 20021120; EP 1257917 A4 20041110; JP 2002541548 A 20021203; JP 4412852 B2 20100210

INPADOC legal status


2006-06-14 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20051222

2005-03-30 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050214

2004-11-10 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20040923

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 06F 11/00 A

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 06F 11/07 B

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 06F 11/16 B

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 06F 11/20 B

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 03K 19/00 B

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7H 03K 19/007 B

2004-11-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 06F 13/40 B

2002-11-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20011031

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT