摘要:
A failure detection improvement apparatus that modifies a net list comprises; a net list input section to which the net list is input; a circuit modification section that adds an observation FF to an appropriate location on the net list; and a net list output section that outputs the net list that has been modified by the circuit modification section.
摘要:
There is provided a circuit design apparatus that performs logic design for realizing a reduction of power consumption and circuit simplification. A circuit design apparatus interprets RTL of a design target to perform structure analysis thereof (S2), estimates generation of a clock gating based on a result of the structure analysis, detects RTL description of an EN generation logic (S3), and detects the same EN generation logic (S4). The apparatus determines an insertion location of the clock gating circuit and reorganization of logical hierarchies based on the detected EN generation logic (S5), instructs logical hierarchy reorganization to be performed in logic synthesis (S8) and performs design change processing (S6). The apparatus performs logic synthesis based on RTL after design change and instruction of logical hierarchy reorganization (S10), and layouts a concrete circuit configuration (S12).
摘要:
A failure detection improvement apparatus that modifies a net list comprises; a net list input section to which the net list is input; a circuit modification section that adds an observation FF to an appropriate location on the net list; and a net list output section that outputs the net list that has been modified by the circuit modification section.
摘要:
A signal distribution circuit includes: first to n-th input lines on which first to n-th signals are respectively input; first to (n−1)th selectors each of which selects one of two inputs under the control of a select signal; and a first output line on which the first signal is output and second to n-th output lines on which output signals of the first to (n−1)th selectors are respectively output, wherein: the first and second inputs of the first selector are supplied with the first signal and the second signal, respectively, the first and second inputs of the i-th selector (i is an integer between 2 and (n−1)) are supplied with the output signal of the (i−1)th selector and the (i+1)th signal, respectively, and any of the selectors, when selected by the select signal, selects the second input and, when not selected by the select signal, selects the first input.
摘要:
An ATM cell bridge apparatus and a cell bridging method as well as an information transmission system having a cell bridge apparatus by which a cell can be outputted in accordance with a priority degree even during multicast processing. The ATM cell bridge apparatus includes a buffer unit for storing cell data of input cells, a buffer control unit for controlling writing and reading out of the cell data into and from the buffer unit, a cell production control unit for managing multicast information of the cell data read out from the buffer unit by the buffer control unit and producing a cell to be outputted from header information of the cell data, and a cell outputting unit for outputting the cell produced by the cell production control unit and issuing a cell data readout request to the buffer control unit.
摘要:
In a transmission apparatus, a comparison unit provides threshold values associated with an amount of data indicating a signal frequency, and compares an input parameter obtained by cumulatively adding a correction amount to the parameter with the threshold values. When the input parameter is within a range defined by the threshold values, a correction unit outputs a value of the input parameter. When the input parameter is out of the defined range, the correction unit outputs an associated one of the threshold values so as to eliminate an amount exceeding or falling short of the defined range, to thereby correct the input parameter. An addition unit detects the correction amount which is an amount of the immediately preceding value of the input parameter exceeding or falling short of the defined range, and cumulatively adds the correction amount to the input parameter used for the comparison of this time.
摘要:
A data amount derivation apparatus includes: a first calculator configured to derive, for one series of parallelized mapping signals, amount of data in each frame period for a frame into which the parallelized mapping signals are mapped; and a second calculator configured to sum up amounts of data in N frame periods, where N is an integer, and to derive the resulting summation value as the amount of data to be mapped into the frame, each of the amounts of data in each of the frame periods being derived by the first calculator.
摘要:
A transmitting apparatus includes a detecting unit that detects deviation and balance relative to a specified bit rate of a frame signal input at a constant bit rate; a dividing unit that reads at constant intervals from a buffer storing the frame signal and outputs a signal divided into a plurality of segments having a predetermined data length; and a correcting unit that, based on the deviation and balance detected by the detecting unit, corrects the data length for the division by the dividing unit.
摘要:
A transmitting apparatus includes a detecting unit that detects deviation and balance relative to a specified bit rate of a frame signal input at a constant bit rate; a dividing unit that reads at constant intervals from a buffer storing the frame signal and outputs a signal divided into a plurality of segments having a predetermined data length; and a correcting unit that, based on the deviation and balance detected by the detecting unit, corrects the data length for the division by the dividing unit.
摘要:
An apparatus for mapping multiple lower-speed signal transmission frames to a higher-speed signal transmission frame. The apparatus includes buffers configured to buffer the lower-speed signal transmission frames, determination units configured to determine frequency justification information for the lower-speed signal transmission frames, a barrel shifter configured to receive signals output from the buffers, and a controller configured to control the barrel shifter to map the lower-speed signal transmission frames to the higher-speed signal transmission frame based on external settings for the respective lower-speed signal transmission frames and the frequency justification information determined by the determination units. When the minimum unit of the lower-speed signal transmission frames is a channel, the number of the buffers and the number of the determination units correspond to the maximum number of channels that can be multiplexed in the higher-speed signal transmission frame.