摘要:
The data access apparatus comprises a phase locked loop (PLL) and a data receiving circuit. The PLL provides a plurality of internal clocks and selecting a strobe clock from the plurality of internal clocks according to a phase selection signal. The data receiving circuit comprises a latching module, for latching of the data signal according to trigger of the strobe clock and a calibrating circuit, for generating the phase selection signal for matching the data with a predetermined data at the plurality of internal clocks in a training mode and finally determining the phase selection signal corresponding to a preferred clock used in a normal mode.
摘要:
The data access apparatus comprises a phase locked loop (PLL) and a data receiving circuit. The PLL provides a plurality of internal clocks and selecting a strobe clock from the plurality of internal clocks according to a phase selection signal. The data receiving circuit comprises a latching module, for latching of the data signal according to trigger of the strobe clock and a calibrating circuit, for generating the phase selection signal for matching the data with a predetermined data according to the plurality of internal clocks in a training mode and finally determining the phase selection signal corresponding to a preferred clock used in a normal mode.
摘要:
A universal memory I/O generating apparatus includes a defining module, a retrieving module, a generating module, and a layout module. The defining module defines a mapping table according to a pin configuration of a plurality of I/Os. The mapping table includes corresponding relationships between the plurality of IOs and a plurality of memory functions. The retrieving module retrieves control information corresponding to the mapping table from candidate information, which is associated with the corresponding relationships between the plurality of I/Os and the plurality of memory functions. The generating module generates a hardware description language (HDL) file according to the control information. The layout module programs the plurality of I/Os according to the HDL file, so that each of the I/Os can correspond to its corresponding memory function.
摘要:
A universal memory I/O generating apparatus includes a defining module, a retrieving module, a generating module, and a layout module. The defining module defines a mapping table according to a pin configuration of a plurality of I/Os. The mapping table includes corresponding relationships between the plurality of IOs and a plurality of memory functions. The retrieving module retrieves control information corresponding to the mapping table from candidate information, which is associated with the corresponding relationships between the plurality of I/Os and the plurality of memory functions. The generating module generates a hardware description language (HDL) file according to the control information. The layout module programs the plurality of I/Os according to the HDL file, so that each of the I/Os can correspond to its corresponding memory function.
摘要:
An I/O calibration method and an apparatus are provided for calibrating a driving impedance at an output end of an I/O circuit in a chip. The chip further includes a plurality of basic impedances and a non-volatile memory. The I/O circuit calibration method includes: measuring an impedance value of one basic impedance and recording the measured impedance value in the non-volatile memory; synthesizing a calibration impedance by selectively conducting the basic impedance(s); adjusting the number of the conducted basic impedance(s) in the calibration impedance and estimating an impedance value of the driving impedance according to the measured result and a voltage divided by the calibration impedance and the driving impedance at the output end.
摘要:
An I/O calibration method and an apparatus are provided for calibrating a driving impedance at an output end of an I/O circuit in a chip. The chip further includes a plurality of basic impedances and a non-volatile memory. The I/O circuit calibration method includes: measuring an impedance value of one basic impedance and recording the measured impedance value in the non-volatile memory; synthesizing a calibration impedance by selectively conducting the basic impedance(s); adjusting the number of the conducted basic impedance(s) in the calibration impedance and estimating an impedance value of the driving impedance according to the measured result and a voltage divided by the calibration impedance and the driving impedance at the output end.
摘要:
A universal IO unit applied to a chip or an integrated circuit is provided. The universal IO unit includes a power pad and a plurality of signal pads for providing different functions. According to functional requirements of the universal IO unit, the pad power is selectively connected to an electric wire to couple to a predetermined voltage, and each of the signal pads is also selectively connected to a signal wire to transceive signals.
摘要:
A universal IO unit applied to a chip or an integrated circuit is provided. The universal IO unit includes a power pad and a plurality of signal pads for providing different functions. According to functional requirements of the universal IO unit, the pad power is selectively connected to an electric wire to couple to a predetermined voltage, and each of the signal pads is also selectively connected to a signal wire to transceive signals.
摘要:
A method and apparatus for managing hysterisis in a delay line. In one embodiment, an integrated circuit includes a delay line. A selection circuit is coupled to an input of the delay line. The selection circuit includes two inputs: a first input coupled to convey a signal such as a data signal or a data strobe signal, while the second input is coupled to convey a dummy clock signal. Control logic is coupled to monitor activity within the delay line. Upon detecting a lack of activity for a predetermined time period, the control logic is configured to cause the selection circuit to allow the dummy clock signal to be conveyed to the input of the delay line.