LSI device with memory and logics mounted thereon
AssigneeFujitsu Limited
InventorsHiroyoshi Tomita, Yasurou Matsuzaki, Masao Taguchi
Life of this patent
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Abstract
A data signal is output from an output circuit of a first chip and sent to a data input terminal in the second chip via a data lead line based on an output clock in first chip, which is sent to the second chip. And an input circuit in a second chip receives the data signal and transfers it inside in response to a transfer clock that has been generated from the output clock in the first chip. In synchronism with a single reference clock in the first chip, therefore, a data signal can be transferred to the second chip from the first chip at a high speed.
Claims2
A memory device having a plurality of memory cells, for inputting input data signals comprising a storing data or an address in synchronism with a clock, comprising:
- a frequency divider for frequency-dividing a frequency of an input clock by N, thereby generating N frequency-divided clocks whose phases are obtained by shifting the phase of said input clock by 360/N degrees;
- and
- input circuits provided in association with individual input data signals and each having N input sections,
- whereby said N input sections respectively input said input data signals in response to said N frequency-divided clocks.
A memory device having a plurality of memory cells, for inputting input data signals comprising a storing data or an address in synchronism with a clock, comprising:
- a frequency divider for frequency-dividing a frequency of an input clock by N, thereby generating N frequency-divided clocks whose phases are obtained by shifting the phase of said input clock by 360/N degrees;
- and
- input circuits provided in association with individual input data signals and each having N input sections,
- whereby said N input sections corresponding said N frequency-divided clocks respectively input said input data signals in response to said input clock.
Dependencies are inferred from the claim text.