Cell counter for UTOPIA interface
AssigneeNEC Corporation
InventorTakaharu Innami
Life of this patent
Estimating the term…
Abstract
A cell counter is connected to a UTOPIA level-2 interface between a UTOPIA bus controller and multiple PHY devices. The cell counter has a PHY identifying section for identifying one of multiple PHY devices using PHY address data on an address bus of the UTOPIA level-2 interface. As long as TXENB_B/RXENB_B is asserted, the number of times TXSOC/RXSOC has been asserted is counted to produce a cell count for the identified PHY device.
Claims12
A circuit for counting cells transferred between a master and each of a plurality of slaves through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising:
- a slave identifying section for identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface, wherein an identified slave is selected as a destination of a cell to be transmitted;
- and
- a counting section for counting start-of-cell indicating signals during a phase for the identified slave.
A circuit for counting cells transmitted from a master to each of a plurality of slaves through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising:
- a slave identifying section for identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface;
- and
- a cell counting section for counting the number of times TXSOC has been asserted when TXENB_B is held active, to produce a count of cells transmitted to an identified slave of the plurality of slaves.
A circuit for counting cells transmitted from each of a plurality of slaves to a master through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising:
- a slave identifying section for identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface;
- and
- a cell counting section for counting the number of times RXSOC has been asserted when RXENB_B is held active, to produce a count of cells received from an identified slave of the plurality of slaves.
A method for counting cells transferred between a master and each of a plurality of slaves through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising the steps of:
- identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface, wherein an identified slave is selected as a destination of a cell to be transmitted;
- and
- counting start-of-cell indicating signals during a phase for the identified slave.
A method for counting cells transmitted from a master to each of a plurality of slaves through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising the steps of:
- a) identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface;
- and
- b) counting the number of times TXSOC has been asserted for an identified slave of the plurality of slaves when TXENB_B is held active, to produce counts of cells transmitted to respective ones of the plurality of slaves.
A method for counting cells transmitted from each of a plurality of slaves to a master through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, comprising the steps of:
- a) identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface;
- and
- b) counting the number of times RXSOC has been asserted for an identified slave of the plurality of slaves when RXENB_B is held active, to produce a count of cells received from the identified slave.
A program instructing a computer to count cells transferred between a master and each of a plurality of slaves through a UTOPIA (Universal Test & Operations PHY Interface for ATM) level-2 interface, the program comprising the steps of:
- identifying one of the plurality of slaves using slave address data on an address bus of the UTOPIA level-2 interface, wherein an identified slave is selected as a destination of a cell to be transmitted;
- and
- counting start-of-cell indicating signals during a phase for the identified slave.
Dependencies are inferred from the claim text.