Panasonic Automotive Systems Co., Ltd.

Kazuhito Tanaka

An electric power measurement circuit includes: a period measurement circuit that measures a measurement period; a first measurer that measures (i) a first toggle number that is a number by which a signal value indicated by an input signal to a first target circuit has changed and (ii) a first operation period that is a period during which the input signal is valid; a second measurer that measures (i) a second toggle number that is a number by which a signal value indicated by an output signal from the first target circuit has changed and (ii) a second operation period that is a period during which the output signal is valid; and a calculator that calculates the first power consumption of the first target circuit based on the measured first toggle number, the measured first operation period, the measured second toggle number, and the measured second operation period.

Electric power measurement circuit

A semiconductor package according to the present disclosure includes: a plurality of semiconductor chips that include a system on chip (SoC) in which a plurality of integrated circuits including a processor core and a microcomputer are integrated on a single chip; a power management integrated circuit (IC) for performing power management on the plurality of semiconductor chips; a plurality of shunt resistors each of which is mounted in series on a different one of power wires connecting the power management IC and the plurality of semiconductor chips; two output terminals; and a single selector that outputs voltages at both ends of a shunt resistor to an outside via the two output terminals, the shunt resistor being selected from among the plurality of shunt resistors. The power management IC, the plurality of semiconductor chips, the plurality of shunt resistors, and the single selector are mounted inside a single package.

Semiconductor package

A command control system is provided which is configured to optimally set an output timing of a RAS command and an output timing of a CAS command for access requests different from each other. The command control system is configured to, when an output timing of a second RAS command is set in a first cycle time period which is a cycle starting from the reference time point, determine whether or not the second RAS command is output to a storage device in the first cycle time period in accordance with whether or not an output timing of a first CAS command is set in a second cycle time period constituted by a prescribed number of the cycles subsequent to the reference time point.

Mitigating interference between commands for different access requests in LPDDR4 memory system

A memory controller controls access to a Synchronous Dynamic Random Access Memory (SDRAM) including banks. The memory controller includes: a receiver that receives a memory access request from an access master; a selector that selects one of a first issue mode and a second issue mode each related to command issuing; and an issuer that issues a command sequence to the SDRAM in response to the memory access request, in accordance with the one of the first issue mode and the second issue mode which is selected by the selector. The first issue mode is a mode in which an activation command for activating a bank among the banks is issued in continuous clock cycles without dividing the activation command, the activation command being included in the command sequence. The second issue mode is a mode in which the activation command is divided and issued in non-continuous clock cycles.

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Shiga, Japan

Kazuhito Tanaka