摘要:
A device includes a bus, a first transmitter connected to the bus and configured to transmit a first signal over the bus in a first frequency band, a second transmitter connected to the bus and configured to transmit a second signal over the bus in a second frequency band at the same time that the first transmitter is transmitting the first signal, a first receiver connected to the bus and configured to receive the first signal transmitted over the bus in the first frequency band, and a second receiver connected to the bus and configured to receive the second signal transmitted over the bus in the second frequency band. The first frequency band and the second frequency band occupy different portions of the frequency spectrum.
摘要:
In an electronic system having first and second logic devices, a free running on-chip clock signal is generated by the first logic device, where the signal has a frequency that is controlled to match that of a global free-running clock signal received by both devices. The on-chip clock signal is synchronized to a strobe signal received by the first device and that was transmitted in association with a data signal by the second device. A logic function is repeatedly performed as synchronized by the first clock signal, to repeatedly generate one or more bits from the data signal.
摘要:
A frequency control unit has an input to receive a digital downstream strobe signal and an output to provide a controlled delay to the input strobe signal. A downstream latch has a data input to receive a digital downstream data signal and a clock input coupled to the output of the frequency control unit. The controlled delay is essentially equal to a set up time of the latch. A delay element coupled to the output of the frequency control unit further delays the downstream strobe signal by essentially a propagation time of the latch. Output drivers are coupled to the outputs of the latch and the delay element.
摘要:
In some embodiments, the invention involves a system having a first group of integrated circuits connected in a truncated ring fashion, wherein the truncated ring includes a truncated region to allow for additional integrated circuits to be added to the ring. In some embodiments, the invention involves a system having a group of integrated circuits connected in a pseudo ring fashion, wherein the pseudo ring is created by data flow of bi-directional signaling between the integrated circuits. In some embodiments, the invention involves a system having a group of integrated circuits connected in a pseudo differential arrangement in which multiple conductors carrying signals share a common reference signal conductor.
摘要:
In some embodiments, the invention involves multiple integrated circuit stubs coupled in series. At least one of the integrated circuit stubs including first conductors to receive signals from a first adjacent one of the integrated circuit stubs, second conductors to provide signals to a second adjacent one of the integrated circuit stubs, and third conductors to provide signals to an integrated circuit chip. The integrated circuit stubs include first drivers and second drivers coupled to the first, second, and third conductors, wherein the first drivers receive the external signals from the first conductors and drive them onto the second conductors and the second drivers receive signals from the first conductors and drive them onto the third conductors.
摘要:
A synchronous clock generator for an integrated circuit is described in which a delay lock loop circuit may be used to delay a first input signal. A delay circuit is coupled to the delay lock loop circuit and receives a control voltage from the delay lock loop circuit, which is used to delay a second input signal. The first and second input signal may be complimentary.
摘要:
A receiver integrated circuit (IC) die or functional unit has deskew circuitry to reduce bit-to-bit timing variation that is no more than one bit time interval in a number of bits that are received, before validating the capture of the bits using a transition in a received strobe signal. The data bits and the strobe signal are driven in a parallel bus section that may be part of a shared multi-drop bus or a point-to-point bus. The system applications include interfacing to a processor or memory bus of a computer system.
摘要:
A system and method for encoding and receiving data is provided. The data is encoded as a pulse amplitude modulated signal such that the amplitude signals do not transition from the highest signal level to the lowest signal level and do not transition from the lowest signal level to the highest signal level. The encoding and decoding is performed in some embodiments via a lookup table, and in further embodiments is designed to minimize the step between sequential pulse amplitude modulated symbols.
摘要:
The invention provides, in an embodiment, an apparatus, method and means for unintrusively observing, echoing and reading signals transmitted by one of a bus and wireless communication, without disturbing electrical properties of the bus, without adding bus latency, and without adding signal discontinuities. In an aspect, a buffer having a trigger is coupled with a component that connects to a memory bus, the buffer echoes signals to an observability port, and a diagnostic device reads the echoed signals. In an aspect, the bus is one of a simultaneous bi-directional (SBD) bus having ternary logic levels, a single ended bus, a differential bus, an optically coupled bus, a chipset bus, a frontside bus, an input/output (I/O) bus, a peripheral component interface (PCI) bus, and an industry standard architecture (ISA) bus. In an aspect, the buffer echoes bus signals having frequencies between 500 MHz. and 5 GHz. In an aspect, the buffer echoes bus signals having frequencies of at least 5 GHz.
摘要:
In some embodiments, the invention involves a circuit including a first set of conductors to carry a current bit set and last bit set circuitry to hold and provide a last bit set. The circuit also includes drivers coupled to interconnect conductors to provide signals from the drivers to the interconnect conductors and an encoder to receive the last bit set and the current bit set and determine whether to provide the current bit set or an encoded version of the current bit set to the drivers.