摘要:
In a system including LSIs, the signature register used for self-testing the LSI functions is assigned to one register accessible by a machine instruction. The signature is calculated in the self-test operation, and the calculation result is updated depending on the result from the execution of the machine instruction. With the above technical idea, the test function for the LSI function is available not only for the test mode, but also for the normal operation. This simplifies the self-test program for testing the functions of the application system.
摘要:
In a data processing apparatus, when making an access to a specific object to be accessed, the data processor supplies an access control signal to a plurality of control signal generators. The data processor further supplies accessed object type data to the accessed object type determining circuit. The determining circuit determines the type of the accessed object on the basis of the accessed object type data, and selectively drives the control signal generator corresponding to the accessed object. The control signal generator driven converts the access control signal into a control signal adapted for the accessed object. An address signal and data are transferred between the specific accessed object supplied with this control signal and the data processor via the address bus and data bus.
摘要:
In an address multiplexing apparatus for multiplexing address data to be supplied to 64K bit, 256K bit, and 1M bit DRAMs, upon multiplexing of address data, input address data of 20 bits are classified into two groups, i.e., the lower 16 bits and the upper 4 bits. The lower 16-bit group is multiplexed so that the upper 8 bits serve as row address data, and the remaining lower 8 bits serve as column address data. In the upper 4-bit group, adjacent bits are multiplexed. The apparatus can be commonly used for the three memories having different capacities with the simple circuit arrangement, and page mode access can be executed.
摘要:
A single chip microcomputer comprises a central processing unit (CPU) 2, a on-chip RAM 3, a on-chip ROM 5, a first bus DBUS for connecting the CPU, RAM, and ROM with one another and transferring data between them, a second bus ABUS for passing address data corresponding to the data passed through the first bus, a third bus SDBUS for connecting the CPU 2 with the RAM 3 and transferring data between them, the number of bits of the third bus SDBUS being larger than that of the first bus DBUS, and a fourth bus BABUS for connecting the CPU 2 with the RAM 3 and passing address data corresponding to the data passed through the third bus SDBUS. The CPU 2 has a data memory RF serving as general purpose registers for providing internal data to the third bus SDBUS, and a bank specifying register BP for holding positional data of a mapping region in the RAM 3 where the contents of the data memory RF are mapped and providing the positional data to the fourth bus BABUS. The RAM 3 has a memory cell array 31, a bank address control circuit 35 connected to the fourth bus BABUS, for generating a real address according to the contents of the bank specifying register BP (BP0, BP1), and a selection circuit 37 for selecting the real address generated by the bank address control circuit 35, or the address provided through the second bus ABUS.
摘要:
A processor includes a bank-structured memory and is capable of handling multiple interrupts. The processor includes a central processing unit (CPU) comprising a plurality of data memories serving as general-purpose registers, and a plurality of bank specifying registers for use in specifying an address to save and restore data without involving an external system bus which connects the CPU and a program memory, such as a built-in read only memory (ROM), for storing a user program. The processor further includes a bank structured memory, connected to the CPU via an exclusive-use data bus, for holding data stored in the data memories using the bank specifying registers and for returning data stored in the bank structural memory to the data memories using the bank specifying registers. The bank specifying registers include a current bank pointer (CBP) or register for indicating a position of a bank presently in use, and a previous bank pointer (PBP) or register for indicating a bank position of data to be returned to the data memories after completing an interrupt routine. The processor may also include a program counter (PC) for indicating an address of a next instruction to be executed by the processor, a processor status word (PSW) for indicating a status of the processor, and a user stack pointer (USP) for indicating an address of a bank storing values of the program counter.
摘要:
According to one embodiment, an information processing apparatus, includes a changing unit which, if a command transmitted from a short-distance wireless communications terminal by pushing down a volume control button is received in a standby status in which the short-distance wireless communications terminal makes no connection with the Internet Protocol telephone communications network, changes selection of the telephone number stored in a memory unit, and a calling unit which, if a command transmitted from the short-distance wireless communications terminal by pushing down a call button is received after the changing process of the changing unit, calls the selected telephone number.
摘要:
A drive circuit for a flat display apparatus is disclosed wherein different display objects can be displayed at a time individually with appropriate gamma characteristics. Reference voltages are produced in a plurality of systems having different gamma characteristics from each other, and one of the systems is selected in response to a selection signal. Then, the reference voltages of the selected system are selected in response to image data to set gradations of pixels.
摘要:
To provide an ink jet recording sheet for plate-making mask film, which has good exposure characteristics and which presents good air release when contacted with a photosensitive resin plate under reduced pressure. An ink jet recording sheet for plate-making mask film, which comprises a substrate sheet and a porous layer formed thereon and has a total luminous transmittance of at least 70% as stipulated by JIS-K7361-1, wherein the porous layer comprises 100 parts by mass of inorganic particles selected from the group consisting of alumina, alumina hydrate, silica and a silica-alumina composite and having an average particle size of at most 250 nm, from 1 to 30 parts by mass of a binder and from 0.1 to 3 parts by mass of porous particles having an average particle size of from 4 to 15 μm and has a thickness of from 5 to 50 μm and an Oken type smoothness of from 200 to 10,000 seconds as stipulated by J. TAPPI No. 5-2.
摘要:
A drive circuit for a flat display apparatus is disclosed wherein different display objects can be displayed at a time individually with appropriate gamma characteristics. Reference voltages are produced in a plurality of systems having different gamma characteristics from each other, and one of the systems is selected in response to a selection signal. Then, the reference voltages of the selected system are selected in response to image data to set gradations of pixels.
摘要:
A filter with which it is possible to control the relationship between a pass band and an attenuation band. In this filter, for example, a single-stage trap filter is electrically connected to a three-stage band pass filter via a coupling capacitor. The trap filter has a serial resonance section composed of a resonator and a resonance capacitor. The serial resonance section is connected in parallel to a capacitive reactance element (capacitor), and a serial circuit composed of an inductive reactance element (inductor) and a PIN diode as a switching element. The capacitive reactance element and the inductive reactance element both serve to make an admittance of the trap circuit substantially zero.