Abstract:
A power consumption reducing method for a radio set is disclosed. A CPU 12 controls various parts of the radio set. A clock signal is fed out to the CPU 1, and its frequency is controlled according to a read signal SRU instructing the reading of data from the CPU 1.
Abstract translation:公开了一种用于无线电设备的功耗降低方法。 CPU 12控制无线电设备的各个部分。 时钟信号被送出到CPU 1,并且根据指示从CPU 1读取数据的读取信号SRU来控制其频率。
Abstract:
A computer is connected to an external device and outputs a command to the external device to shift the external device to a power saving state. The computer comprises an operating system generating a first power saving command for shifting the external device to a first power saving state when a non-operation time reaches a first time, a driver converting the first power saving command into a second power saving command for shifting the external device to a second power saving state in which power consumption is lower than the first power saving state. The converted second power saving command is output to the external device.
Abstract:
A power control circuit an corresponding technique for adjusting operating frequency and/or supply voltage in sections of a single electronic device while maintaining substantially constant operating frequency and/or supply voltage in the other sections in the electronic device. Such control is based on the operating environment of the hardware product employing the electronic device by determining whether the hardware product is connected to an external power source. As a result, the electronic device in the hardware product is able to operate at full frequency and voltage during certain situations and to operate at a reduced frequency and/or voltage in some sections of the processor and not in the other sections during other situations.
Abstract:
A control section sets a value “1” to a first flip-flop when a core executes a halt instruction. An OR circuit halts to output the clock. When the detection section detects an occurrence of the exception request, the control section copies the value “1” of the first flip-flop to a second flip-flop and then sets the value “0” to the first flip-flop to restart the supply of the clock to the core through the circuit. When detecting that the value “1” is set in the second flip-flop, the core judges that the state of the core was in the halt state when the exception request occurred, the core returns to the halt state after the completion of the exception handling by executing the halt instruction. When the second flip-flop does not store the value “1”, the core executes an instruction next to the address of the halt instruction.
Abstract:
A microcomputer includes reloadable registers for prestoring count values corresponding to an ineffective interval and an effective interval which are set in accordance with the timing of a first edge and a second edge of a head pulse signal, and for setting these count values sequentially into a counter. Only when the first edge and second edge are input at predetermined timing through an event input terminal, that is, only when the head pulse signal is input, the interrupt signal is generated for changing the operation mode from a low current consumption mode to a normal operation mode. This makes it possible to prevent a mode transition due to noise, and reduce the power consumption of the microcomputer by making more effective use of the low current consumption mode by improving a mode transition identification rate.
Abstract:
A computer system has at least one processor and at least one queue for storing instructions for execution by the processor. The processor is capable of being clocked at a plurality of rates. A number of instructions in the queue is measured. The optimum clock rate is selected based on in part the determined number of queued instructions.
Abstract:
A power consumption control method for collectively controlling the power consumption of electronic apparatuses connected to a network is provided. When an electronic apparatus is connected to the network, a management device performs power-saving control for the electronic apparatus. When the electronic apparatus is disconnected from the network, the electronic apparatus performs the power-saving control for itself. Thus, the power consumption of the clients connected to the network can be effectively reduced.
Abstract:
A system and corresponding method use a PAUSE instruction as a low power hint in a single threaded or multithreaded environment using “processor slow mode.” One embodiment actually lowers the frequency of the processor clock. Another embodiment virtually lowers the frequency of the processor clock by gating M clock cycles out of every N clock cycles. When all threads have issued a PAUSE instruction, the processor enters slow mode and remains there for a while. After this while, the processor returns to normal mode. Alternatively, an event, such as an interrupt or an exception, can cause the processor to return to normal mode from slow mode.
Abstract:
A method for placing a device in a reduced power-consumption mode of operation. The method comprises the steps of initializing a device select signal into a first logic state, asserting the device select signal in a second logic state, and returning the device select signal to the first logic state within a first predetermined time window. A device is also described that includes means for detecting logic state transitions at a device select input and a clock input, and means for changing operating mode of the device in response to a predetermined number of logic state transitions at the clock input, occurring between logic state transitions at the device select input.
Abstract:
A portable information processing apparatus includes a memory, an AC/DC converter, a built-in battery, a power source detection mechanism, and a switch. The memory includes a main memory block and a sub memory block. The AC/DC converter converts an AC voltage to a DC voltage supplied to the memory. The built-in battery supplies a battery DC voltage supplied to the memory. The power source detection mechanism detects whether the apparatus operates with the converted AC to DC voltage or the battery DC voltage. The power source detection mechanism generates a detection signal when detecting the battery DC voltage. If the switch receives no detection signal from the power source detection mechanism, the switch supplies the converted AC to DC voltage and the battery DC voltage to the main and sub memory blocks. Otherwise, he switch shuts off a supply of the battery DC voltage to the sub memory block of the memory when receiving the detection signal from the power source detection mechanism.