摘要:
An integrated circuit device includes at least one functional module which outputs save data in synchronism with a saving clock signal, a power supply control unit which selects one of the functional modules, and controls stop and resumption of power supply to the selected functional module, a save data storage unit which stores save data output from a functional module selected by the power supply control unit, and an error checking and correction unit which performs error checking and correction for the save data stored in the save data storage unit when the save data is to be restored to the functional module in synchronism with a restoration clock signal.
摘要:
An ACS circuit includes: a basic DPM retaining section (11) for retaining basic DPMs (differential path metrics); a basic DPM calculating section (12) for calculating the basic DPMs; a reference DPM calculating section (13) for calculating reference DPMs, which are DPMs other than the basic DPMs; a basic DBM calculating section (14) for calculating basic DBMs (differential branch metrics), which are DBMs necessary for calculating the basic DPMs; and a path selecting section (15) for selecting the most likely paths for Viterbi decoding in accordance with the basic DPMs, the reference DPMs and the basic DBMs. The basic DPM calculating section (12) calculates new basic DPMs in accordance with the basic DPMs, the reference DPMs, the basic DBMs, and the results of the most likely path selection by the path selecting section (15).
摘要:
A data retaining circuit has been disclosed in which, even if a soft error occurs, it is corrected and a normal value can be maintained, the configuration is simple, and high-speed operations are enabled. In this circuit, when a soft error occurs in the data to be put out, it is corrected by a pull-up path or a pull-down path, and when a soft error occurs in the data in the pull-up path or the pull-down path, the error data in the pull-up path or the pull-down path is prevented from affecting each other, as well as turning off the correcting function to prevent the influence on the data to be put out.
摘要:
A power-saving network unit, which is connected to a network made up of a plurality of power-saving network units, includes: network monitoring means; network information memory; power-saving mode setting means; peripheral I/O interface; and digital processor. The network monitoring means monitors a topology of the network, or the interconnection relationship among the power-saving network units. Every time the network has been modified, the network monitoring means stores the modified network topology on the network information memory. The power-saving mode setting means receives the network information stored on the network information memory. If the power-saving network unit is a master or relay node in the network, then the power-saving mode setting means locks the peripheral I/O interface and digital processor of the power-saving network unit to the normal operation mode and prohibits these sections from entering the power-saving mode.
摘要:
A PLL comprises a current-controlled oscillator (18) for generating an output clock signal based on a current signal generated based on a phase difference between a reference clock signal and a feedback clock signal, a current source (28), and an initialization switch (26) for performing an open/close operation based on the initialization signal, the initialization switch being inserted in series to an input terminal of the current-controlled oscillator (18) and the current source (28).
摘要:
An ACS circuit includes: a basic DPM retaining section (11) for retaining basic DPMs (differential path metrics); a basic DPM calculating section (12) for calculating the basic DPMs; a reference DPM calculating section (13) for calculating reference DPMs, which are DPMs other than the basic DPMs; a basic DBM calculating section (14) for calculating basic DBMs (differential branch metrics), which are DBMs necessary for calculating the basic DPMs; and a path selecting section (15) for selecting the most likely paths for Viterbi decoding in accordance with the basic DPMs, the reference DPMs and the basic DBMs. The basic DPM calculating section (12) calculates new basic DPMs in accordance with the basic DPMs, the reference DPMs, the basic DBMs, and the results of the most likely path selection by the path selecting section (15).
摘要:
The frequency modulation circuit includes: a phase shift section for receiving a multiphase clock signal composed of a plurality of clock signals having a predetermined phase difference therebetween and shifting the phase of the multiphase clock signal; a clock selection section for selecting a clock signal constituting the multiphase clock signal output from the phase shift section; and a modulation control section for controlling the phase shift section and the clock selection section so that a clock signal having a frequency different from the frequency of the multiphase clock signal input into the phase shift section is output from the clock selection section.
摘要:
A data retaining circuit has been disclosed in which, even if a soft error occurs, it is corrected and a normal value can be maintained, the configuration is simple, and high-speed operations are enabled. In this circuit, when a soft error occurs in the data to be put out, it is corrected by a pull-up path or a pull-down path, and when a soft error occurs in the data in the pull-up path or the pull-down path, the error data in the pull-up path or the pull-down path is prevented from affecting each other, as well as turning off the correcting function to prevent the influence on the data to be put out.
摘要:
A data retaining circuit has been disclosed in which, even if a soft error occurs, it is corrected and a normal value can be maintained, the configuration is simple, and high-speed operations are enabled. In this circuit, when a soft error occurs in the data to be put out, it is corrected by a pull-up path or a pull-down path, and when a soft error occurs in the data in the pull-up path or the pull-down path, the error data in the pull-up path or the pull-down path is prevented from affecting each other, as well as turning off the correcting function to prevent the influence on the data to be put out.
摘要:
A bus transfer apparatus for receiving a packet and repeating the received packet, in which the packet includes a PREFIX portion indicating the head of the packet, a DATA portion storing data, and an END portion indicating the end of the packet, includes a control circuit for receiving the packet and outputting the PREFIX portion of the packet as a control signal; a counter for counting a time period during which the control circuit outputs the PREFIX portion, and outputting a counter full signal when the time period reaches a predetermined lower limit; an address pointer for determining a read address in response to the counter full signal; a data buffer for holding the DATA portion of the packet and outputting the DATA portion in accordance with the read address; an encoder for converting the DATA portion output from the data buffer to a predetermined format; and a first selector for selecting either the PREFIX portion output from the control circuit or the DATA portion output from the encoder. The output signal from the first selector is switched from the PREFIX portion of the packet to the DATA portion of the packet after the counter full signal is output from the counter.