公开(公告)号：GB2497015B

公开(公告)日：2015-08-12

申请号：GB201301906

申请日：2012-05-31

Applicant: IBM

Inventor： SCHULZ PHILIP SEBASTIAN ,  HESS THOMAS ,  STRASSER MARKUS ,  WERNER CONSTANTIN ,  WAGNER SVEN

IPC: G06F13/40

Abstract: Retrieval of status information from a remote device performed on a host system is provided, wherein the remote device is connected to the host system via a bus system comprising at least two signal lines terminated with resistors on the host system side and on the remote device side. The retrieval method includes: activating a sensing phase; sensing the at least two terminated signal lines during the sensing phase; and determining operating state of the remote device based on the sensing result; wherein at least a first operating state representing a connected and powered remote device is detectable.

公开(公告)号：GB2497015A

公开(公告)日：2013-05-29

申请号：GB201301906

申请日：2012-05-31

Applicant: IBM

Inventor： SCHULZ PHILIP SEBASTIAN ,  HESS THOMAS ,  STRASSER MARKUS ,  WERNER CONSTANTIN ,  WAGNER SVEN

IPC: G06F13/40

Abstract: Method for determining status information of remote devices performed on host system connected via bus system comprising two signal lines (clock SCL, data SDA). Clock line is terminated with pull-up resistor RHC1 on host and switchable resistor on remote device; data line is terminated with pull-down resistor RHD0 on host and pull-up resistor RRD1 on device. The method comprises the steps: activating sensing phase; sensing the two terminated signal lines (Clk SCL, Dat SDA) during sensing phase; determining operating state of the remote device based on sensing result; wherein four different operating states are detectable. First state represents remote device plugged, powered, and initialised (clock signal line high, data line high); second state is for unplugged device (high, low); third state is for plugged but not powered device (low, low); fourth state is for plugged, powered, but not initialised state (low, high). The bus can be low-pin count bus (I2C).

公开(公告)号：DE102012209958A1

公开(公告)日：2012-12-27

申请号：DE102012209958

申请日：2012-06-14

Applicant: IBM

Inventor： SCHULZ PHILIP SEBASTIAN ,  STRASSER MARKUS K ,  WAGNER SVEN ,  HESS THOMAS ,  WERNER CONSTANTIN

IPC: G06F13/40 ,  G06F13/00

Abstract: Es wird in verbessertes Verfahren zum Abrufen von Statusinformation von einer fernen Einheit offenbart, das auf einem Hostsystem durchgeführt wird, wobei die ferne Einheit mit dem Hostsystem über ein Bussystem verbunden ist, das mindestens zwei Signalleitungen (SCL, SDA) umfasst, die auf der Hostsystemseite und auf Seiten der fernen Einheit mit Widerständen (RHC1, RHD0, RRD1, RRCS) abgeschlossen sind. Das Verfahren umfasst die folgenden Schritte; Aktivieren einer Abfragephase; Abfragen der mindestens zwei abgeschlossenen Signalleitungen (SCL, SDA) während der Abfragephase; und Bestimmen des Betriebszustands der fernen Einheit auf der Basis des Abfrageergebnisses; wobei mindestens ein erster Betriebszustand erkennbar ist, der einer angeschlossenen und stromgespeisten fernen Einheit entspricht.

公开(公告)号：GB2492207B

公开(公告)日：2014-03-05

申请号：GB201209687

申请日：2012-05-31

Applicant: IBM

Inventor： SCHULZ PHILIP SEBASTIAN ,  HESS THOMAS ,  STRASSER MARKUS ,  WERNER CONSTANTIN ,  WAGNER SVEN

IPC: G06F13/40

Abstract: Retrieval of status information from a remote device performed on a host system is provided, wherein the remote device is connected to the host system via a bus system comprising at least two signal lines terminated with resistors on the host system side and on the remote device side. The retrieval method includes: activating a sensing phase; sensing the at least two terminated signal lines during the sensing phase; and determining operating state of the remote device based on the sensing result; wherein at least a first operating state representing a connected and powered remote device is detectable.

公开(公告)号：GB2492207A

公开(公告)日：2012-12-26

申请号：GB201209687

申请日：2012-05-31

Applicant: IBM

Inventor： SCHULZ PHILIP SEBASTIAN ,  HESS THOMAS ,  STRASSER MARKUS ,  WERNER CONSTANTIN ,  WAGNER SVEN

IPC: G06F13/40

Abstract: Method for retrieving status information from remote devices performed on host system connected via bus system comprising two signal lines (clock SCL, data SDA) terminated with resistors on host (RHC1, RHD0) and device (RRC0, RRD1) side. The method comprises the steps: activating sensing phase 100; sensing the two terminated signal lines (Clk SCL, Dat SDA) during sensing phase 100; determining operating state of the remote device based on sensing result; wherein first operating state representing a connected and powered remote device is detectable. The resistors can be pull up or pull down resistors. Signal lines can be terminated identically or inversely, to detect four different operating states, also via switchable resistors. Second state is unplugged device; third state is plugged but not powered device; fourth state is invalid state or connected, powered but not initialised device. The invention can work within low pin count bus environments.