摘要:
In a circuit block 110 to be an object of power-off, voltage detecting circuits 130 and 134 are disposed near power supply terminals 140 and 142, respectively, and voltage detecting circuits 132 and 136 are disposed at given positions far from the terminals 140 and 142, respectively, on power lines 141 and 143 of two electric-supply systems. The voltage detecting circuits are each made of MOS transistors only. At turning on the power from a power supply circuit 150 again, after all the voltage detecting circuits have detected arrival of power-supply voltages at a predetermined potential, a reset signal generating circuit 160 stops the input of a reset signal to the circuit block 110. Accordingly, since the reset state is stopped after the arrival of the power-supply voltages at the predetermined voltage, a semiconductor integrated circuit is initialized normally. This provides a semiconductor integrated circuit capable of generating a power-on reset signal appropriately.
摘要:
An execution control instruction is applied to an information processor of the type processing instructions by pipelining to suppress the occurrence of branch hazard. The execution control instruction contains: a condition field for specifying an execution condition; and an instruction-specifying field for defining, in binary code, the number of instructions to be executed only conditionally. In response to the execution control instruction, a nullification controller decides, based on control flags provided from an arithmetic logic unit, whether or not the execution condition specified by the condition field is satisfied. And based on the outcome of this decision, the controller determines whether or not that number of instructions, which has been defined by the instruction-specifying field for instructions succeeding the execution control instruction, should be nullified. If the controller has determined that the specified number of succeeding instructions should be nullified since the execution condition is not met, then the controller asserts a nullification signal to be supplied to the arithmetic logic unit. In this manner, a large number of succeeding instructions are executable conditionally using an execution control instruction of a short word length.
摘要:
In a data processor for updating path metrics in Viterbi decoding, an ACS processing can be efficiently executed with small power consumption. An ACS processing unit obtains an updated path metric through an ACS processing on the basis of pre-update path metrics read from a memory. In the memory, two pre-update path metrics necessary for obtaining one updated path metric are stored in an even address and an odd address having common bits excluding the least significant bits, so that the two pre-update path metrics can be read through one access. In the first cycle, the ACS processing unit makes an access to the memory and obtains a first updated path metric through the ACS processing on the basis of the thus read two pre-update path metrics. In the second cycle, without making any access to the memory, the ACS processing unit obtains a second updated path metric through the ACS processing on the basis of the two pre-update path metrics read in the first cycle.
摘要:
An arithmetic apparatus in which while data read out of a memory is shifted by means of a barrel shifter by a shift bit number designated by data standing for an output signal of an inverter, data standing for an output signal of the barrel shifter is inputted to a shift register to thereby perform Viterbi decoding at a high speed.
摘要:
The present invention provides a data input/output control device integrating a one-chip microcomputer together with a data transfer device and a processor, the data transfer device being constructed to transmit to and receive from an external apparatus serial data and the processor processing data inputted to the data transfer device and transmitting the processed data to the data transfer device to be further transmitted to the external apparatus, the date input/output control device characterized in that a clock of the data input/output control device for an operation thereof is a transfer clock utilized by the external apparatus and the transfer clock is slower than a clock for the processor.The data input/output control device comprises a controller for controlling the data input and the data output of the data transfer device, a flag holding unit for holding a flag which shows if the data have been inputted to the data transfer device by the processor or the external apparatus, a first synchronization circuit for synchronizing an output from the flag holding unit with the transfer clock, the output being sent to the controller, and a second synchronization circuit for synchronizing the output from the flag holding unit with the clock for the processor.
摘要:
A panel control device includes a programmable array. This programmable array operates in accordance with a configuration code and includes a plurality of first-class elements and at least one second-class element. This provides a panel control device requiring a small circuit area, being suitable for system-on-chip (SoC) mounting, and driving a liquid crystal display device having various specifications also in the future.
摘要:
The power consumption and area of a programmable logic device formed from programmable logical elements can be reduced.In a programmable logic device 101 formed from programmable logical elements, there are provided first logical elements 102 and second logical elements 104 having the same logic as the first logical elements 102 but having an upper limit of operating speed designed to be lower than that of the first logical elements 102.
摘要:
A sales supporting system is described, a representative one of which includes a sales support system for supporting work of a salesperson of commodities, comprising: input means for entering life information regarding life of a customer; commodity selection support information generating means for generating commodity selection support information for supporting selection by the salesperson of a commodity for health of the customer on the basis of the life information entered by using the input means; and output means for outputting the commodity selection support information generated by the commodity selection support information generating means.
摘要:
A terminal device transmits device information thereof and a request for acquiring information contents to a contents distribution device. The contents distribution device generates a request for distributing a program for materializing the information contents in the terminal device based on the information contents designated in the acquisition request and the device information, and transmits a license request for using a function standard required for realizing the function to a license management device. The license management device receives the usage license request and correspondingly transmits an authorization for using the function standard to the program distribution device and the contents distribution device. The program distribution device transmits the program to the terminal device only when the usage authorization is received. The contents distribution device transmits the information contents to the terminal device only when the usage authorization is received.
摘要:
A terminal device transmits device information thereof and a request for acquiring information contents to a contents distribution device. The contents distribution device generates a request for distributing a program for materializing the information contents in the terminal device based on the information contents designated in the acquisition request and the device information, and transmits the distribution request to a program distribution device and transmits the device information to an inspection device. The program distribution device transmits the program in the distribution request to the inspection device. The inspection device inspects a materialization state of the information contents in the terminal device based on the program and the device information and transmits a result of the inspection to the program distribution device and the contents distribution device. The program distribution device transmits the program to the terminal device and the contents distribution device transmits the information contents to the terminal device only when the inspection result is favorable.