摘要:
A receiver for a serial link port that is enhanced by a clock-data-recovery loop connected to the forwarded clock signal lane. The receiver includes a phase interpolation means controlled by a phase position logic which gets its update signal from local phase update signals of the clock-data-recovery loop via a digital low pass filter. The receiver also provides a global phase update source selection logic to control which clock-data-recovery loop is distributing phase update information, and which clock-data-recovery loop is receiving phase update information based on the clock analysis block.
摘要:
A receiver for a serial link port that is enhanced by a clock-data-recovery loop connected to the forwarded clock signal lane. The receiver includes a phase interpolation means controlled by a phase position logic which gets its update signal from local phase update signals of the clock-data-recovery loop via a digital low pass filter. The receiver also provides a global phase update source selection logic to control which clock-data-recovery loop is distributing phase update information, and which clock-data-recovery loop is receiving phase update information based on the clock analysis block.
摘要:
A method for synchronizing interconnects in a link system according to various embodiments can include receiving input data at a transmit side, the transmit side including at least one pseudo-random bit sequence scrambler; scrambling the input data at the transmit side via the pseudo-random bit scrambler with dual tap sequences resulting in scrambled data; transmitting the scrambled data with the dual tap sequences along all lanes of a plurality of lanes to a receive side via a bus interconnecting the plurality of lanes, the receive side including at least one pseudo-random bit sequence descrambler; synchronizing the at least one pseudo-random bit sequence scrambler to the at least one pseudo-random bit sequence descrambler; using an edge detection or transition detection device for synchronization of the descrambler to the scrambler; and de-scrambling the transmitted scrambled data at the receive side resulting in the input data.
摘要:
An interfacing apparatus and related method is provided for configuring to couple a plurality of memory devices being addressable by means of an address space to a processing unit. In one embodiment, the apparatus comprises a first memory access unit being adapted for receiving a memory address from said processing unit and for accessing said memory devices accordingly based on the address provided. It also comprises a second memory access unit being adapted for receiving content data from the processing unit and for controlling a search or update function accordingly for the received content data in one or more of the memory devices. In addition, an allocation unit is also provided for allocating a first part of the address space of the memory devices to said first memory access unit and allocating a second part of the address space of said memory devices to the second memory access unit, each of the memory access units being assigned to corresponding memory devices of the plurality of memory devices.
摘要:
A receiver for a serial link port that is enhanced by a clock-data-recovery loop connected to the forwarded clock signal lane. The receiver includes a phase interpolation means controlled by a phase position logic which gets its update signal from local phase update signals of the clock-data-recovery loop via a digital low pass filter. The receiver also provides a global phase update source selection logic to control which clock-data-recovery loop is distributing phase update information, and which clock-data-recovery loop is receiving phase update information based on the clock analysis block.
摘要:
An apparatus and a corresponding method for coupling a memory device being addressable by means of an address space to a processing unit, the apparatus consisting: a first memory access unit being adapted for receiving a memory address from the processing unit and for accessing the memory device by the received memory address; a second memory access unit being adapted for receiving content data (an input key) from the processing unit and for controlling a search for the received content data in the memory device, and an allocation unit for allocating a first part of the address space of the memory device to the first memory access unit and a second part of the address space of the memory device to the second memory access unit. A storage medium to perform coupling a memory device being addressable by means of an address space to a processing unit is also provided.
摘要:
A system for synchronizing interconnects in a link system according to various embodiments can include a computer configured to receive input data at a transmit side, the transmit side including at least one pseudo-random bit sequence scrambler; scramble the input data at the transmit side via the pseudo-random bit scrambler with dual tap sequences resulting in scrambled data; transmit the scrambled data with the dual tap sequences along all lanes of a plurality of lanes to a receive side via a bus interconnecting the plurality of lanes, the receive side including at least one pseudo-random bit sequence descrambler, and the receive side directly connected to the transmit side via the bus; synchronize the at least one pseudo-random bit sequence scrambler to the at least one pseudo-random bit sequence descrambler; and de-scramble the transmitted scrambled data at the receive side resulting in the input data.
摘要:
A signal generator for generating multiple phases includes a ring oscillator with at least one first adjustable delay stage and at least one second delay stage being serially arranged, wherein an output of the first delay stage is provided for delivering at least one first output phase and an output of the second delay stage is provided for delivering at least one second output phase, and an adjustment circuit for adjusting the delay of the first adjustable delay stage, wherein the adjustment circuit is provided for adjusting the phase relationship between the first output phase and the second output phase by means of setting a first propagation delay for the first delay stage.
摘要:
A unified, unidirectional serial link is described for providing data across wired media, such as a chip-to chip or a card-to-card interconnect. It consists of a transmit section and a receive section that are operated as pairs to allow the serial data communication. The serial link is implemented as part of a VLSI ASIC module and derives its power, data and clocking requirements from the host modules. The logic transmitter portion contains a phase locked loop (PLL), a dibit data register, a finite impulse response (FIR) filter and a transmit data register. The phase locked loop comprises both a digital coarse loop and an analog fine loop. The digital receiver portion contains a PLL, an FIR phase rotator, a phase rotator control state machine, and a clock buffer. The transmitter and the receiver each preferably utilize a pseudo-random bit stream (PRBS) generator and checker.
摘要:
A method and system for decision feedback equalization for digital transmission systems is provided. Low-power integrating decision feedback equalization with fast switched-capacitor paths are used, for suppressing intersymbol interference (ISI) due to past data symbols. The decision feedback equalization involves performing current-integrating decision feedback equalization at low-power employing a fast capacitively coupled feed-forward path at the output of a current-integrating buffer and inducing voltage changes by charge redistribution via coupled switching capacitors, and performing a voltage digital-to-analog conversation to determine a feedback coefficient as a coupling voltage. Then switches are reset to a pre-charge coupling voltage in the buffers to eliminate residual ISI caused by signal history, thereby achieving current integrating buffering with switched-capacitor feedback during the integration, and the capacitive switches are triggered by previous symbols.