EP 1257917 A4 20041110 - 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
Application
Priority
- US 0009155 W 20000406
- US 12822299 P 19990407
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
G06F 11/00; G06F 11/07; G06F 11/16; G06F 11/20; H03K 19/00; H03K 19/007; G06F 13/40
IPC 8 full level
G06F 13/36 (2006.01); G06F 13/40 (2006.01); G06F 11/00 (2006.01)
CPC (source: EP)
G06F 13/4068 (2013.01); G06F 11/004 (2013.01)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 0060462A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0060462 A1 20001012; EP 1257917 A1 20021120; EP 1257917 A4 20041110; JP 2002541548 A 20021203; JP 4412852 B2 20100210
DOCDB simple family (application)
US 0009155 W 20000406; EP 00923146 A 20000406; JP 2000609887 A 20000406