Data processor having integrated circuit memory refresh
First Claim
Patent Images
1. An integrated circuit digital processing system comprising:
- an integrated circuit dynamic memory storing digital data;
an integrated circuit digital processor coupled to the integrated circuit dynamic memory and processing the digital data stored by said integrated circuit dynamic memory;
an integrated circuit control circuit periodically generating a refresh signal to command refresh of the digital data stored by said integrated circuit dynamic memory; and
an integrated circuit refresh circuit coupled to said integrated circuit dynamic memory and coupled to said integrated circuit control circuit and refreshing the digital data stored by said integrated circuit dynamic memory in response to the refresh signal without conflict with the processing of the digital data by said integrated circuit digital processor.
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Abstract
An improved data processor architecture is provided having integrated circuit (IC) memories. Provision is made for dynamic memories with a memory refresh arrangement. Memory refresh is provided in response to instruction execution, synchronized with computer control signals to minimize contention or conflicts with computer operations and to share control circuitry.
77 Citations
82 Claims
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1. An integrated circuit digital processing system comprising:
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an integrated circuit dynamic memory storing digital data; an integrated circuit digital processor coupled to the integrated circuit dynamic memory and processing the digital data stored by said integrated circuit dynamic memory; an integrated circuit control circuit periodically generating a refresh signal to command refresh of the digital data stored by said integrated circuit dynamic memory; and an integrated circuit refresh circuit coupled to said integrated circuit dynamic memory and coupled to said integrated circuit control circuit and refreshing the digital data stored by said integrated circuit dynamic memory in response to the refresh signal without conflict with the processing of the digital data by said integrated circuit digital processor. - View Dependent Claims (2, 3, 8)
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4. An integrated circuit digital processing system comprising:
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an integrated circuit dynamic memory storing digital data; an integrated circuit digital processor coupled to the integrated circuit dynamic memory and processing the digital data stored by said integrated circuit dynamic memory; an integrated circuit control circuit periodically generating a refresh signal to command refresh of the digital data stored by said integrated circuit dynamic memory; an integrated circuit refresh circuit coupled to said integrated circuit dynamic memory and coupled to said integrated circuit control circuit and refreshing the digital data stored by said integrated circuit dynamic memory in response to the refresh signal without conflict with the processing of the digital data by said integrated circuit digital processor; and a disable circuit coupled to said integrated circuit digital processor and to said integrated circuit control circuit to disable the processing by said integrated circuit digital processor of the digital data stored by said integrated circuit dynamic memory during refreshing of said dynamic memory in response to the refresh signal. - View Dependent Claims (5, 7)
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6. An integrated circuit digital processing system comprising:
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an integrated circuit read only memory storing a program; an integrated circuit dynamic memory storing digital data; an integrated circuit digital processor coupled to the data integrated circuit read only memory and to the integrated circuit dynamic memory and processing digital data stored by said integrated circuit dynamic memory in response to the program stored by said integrated circuit read only memory; an integrated circuit control circuit periodically generating a refresh signal to command refresh of the digital data stored by said integrated circuit dynamic memory; an integrated circuit refresh circuit coupled to said integrated circuit dynamic memory and coupled to said integrated circuit control circuit and refreshing the digital data stored by said integrated circuit dynamic memory in response to the refresh signal without conflict with the processing of the digital data by said integrated circuit digital processor; and a disable circuit coupled to said integrated circuit digital processor and to said integrated circuit control circuit to disable the processing by said integrated circuit digital processor of the digital data stored by said dynamic memory during refreshing of said dynamic memory in response to the refresh signal.
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9. An integrated circuit digital processing system comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of a selected state among the plurality of more significant bits in the memory address; an integrated circuit dynamic memory coupled to said integrated circuit memory address detector and storing digital data in response to the address detector signal; an integrated circuit digital processor coupled to the an integrated circuit dynamic memory and processing the digital data stored by said integrated circuit dynamic memory; an integrated circuit control circuit periodically generating a refresh signal to command refresh of the digital data stored by said integrated circuit dynamic memory; and an integrated circuit refresh circuit coupled to said integrated circuit dynamic memory and coupled to said integrated circuit control circuit and refreshing the digital data stored by said integrated circuit dynamic memory in response to the refresh signal without conflict with the processing of the digital data by said integrated circuit digital processor.
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10. An integrated circuit digital computer comprising:
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an integrated circuit dynamic memory storing computer instructions and computer operands; an integrated circuit refresh circuit coupled to refresh the computer instructions and computer operands stored by said integrated circuit dynamic memory in response to a refresh signal; integrated circuit processing logic coupled to process the computer operands stored by said integrated circuit dynamic memory in response to the computer instructions stored by said integrated circuit dynamic memory; and an integrated circuit control circuit coupled to periodically generate the refresh signal to command the integrated circuit refresh circuit to refresh said integrated circuit dynamic memory during a time interval that does not conflict with the processing of the computer operands by said integrated circuit processing logic. - View Dependent Claims (11, 12)
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13. A digital computer system comprising:
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an integrated circuit dynamic memory storing digital information which includes computer instructions and computer operands; an integrated circuit instruction execution control circuit generating a sequence of instruction execution control signals to control execution of a computer instruction stored by said integrated circuit dynamic memory; an integrated circuit processor coupled to the instruction execution control circuit and processing the computer operands stored by said integrated circuit dynamic memory in response to the sequence of instruction execution control signals generated by said integrated circuit instruction execution control circuit; a refresh control circuit generating a refresh control signal after completion of the sequence of instruction execution control signals generated by said integrated circuit instruction execution control circuit; and a refresh execution circuit coupled to receive the refresh control signal and to refresh the digital information stored by said integrated circuit dynamic memory in response thereto.
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14. A digital computer system comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of a selected state among the plurality of more significant bits in the memory address; an integrated circuit dynamic memory coupled to said integrated circuit memory address detector and storing digital information which includes computer instructions and computer operands in response to the memory address detector signal; an integrated circuit instruction execution control circuit generating a sequence of instruction execution control signals to control execution of a computer instruction stored by said integrated circuit dynamic memory; an integrated circuit processor coupled to the instruction execution control circuit and to the integrated circuit dynamic memory and processing the computer operands stored by the integrated circuit dynamic memory in response to the sequence of instruction execution control signals generated by said integrated circuit instruction execution control circuit; a refresh control circuit generating a refresh control signal after completion of the sequence of instruction execution control signals generated by said integrated circuit instruction execution control circuit; and a refresh execution circuit coupled to receive the refresh control signal and to refresh the digital information stored by said integrated circuit dynamic memory in response thereto.
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15. A stored program digital processor comprising:
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a dynamic memory storing digital instructions; a control circuit including an instruction execution control circuit generating a sequence of instruction execution control signals controlling execution of instructions and a refresh control circuit generating a refresh signal following a sequence of instruction execution control signals generated by said instruction execution control circuit; an instruction execution circuit coupled to receive and execute instructions stored by said dynamic memory in response to the sequence of instruction execution control signals generated by said instruction execution control circuit; and a refresh circuit coupled to refresh said dynamic memory in response to the refresh signal generated by said refresh control circuit.
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16. A stored program computer system comprising:
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a dynamic memory storing a program having a plurality of computer instructions; an instruction execution circuit coupled to execute computer instructions stored by said dynamic memory; and a refresh circuit coupled to refresh said dynamic memory without conflicting with execution by said instruction execution circuit of a computer instruction stored by the dynamic memory. - View Dependent Claims (23, 24)
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17. A stored program computer system comprising:
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an address register storing a memory address; an address decoder coupled to the address register and generating a plurality of decoded address signals in response to the memory address stored by said address register; a dynamic random access memory coupled to said address decoder and storing a program having a plurality of computer instructions and storing a plurality of computer operands, wherein said dynamic random access memory includes a plurality of integrated circuit dynamic random access memory chips storing the computer instructions and the computer operands, wherein each of said plurality of integrated circuit dynamic random access memory chips is selected by at least one of the plurality of decoded address signals generated by said address decoder; a refresh circuit coupled to refresh the digital data stored by said plurality of dynamic random access memory chips included in said dynamic random access memory without conflicting with execution of a computer instruction by said instruction execution circuit; an instruction execution circuit coupled to execute the computer instructions stored by a selected dynamic random access memory chip included in said dynamic random access memory in response to a decoded address signal generated by said address decoder to process the computer operands stored by a selected dynamic random access memory chip included in said dynamic random access memory in response to a decoded address signal generated by said address decoder; and a refresh circuit coupled to said dynamic random access memory and periodically refreshing said plurality of dynamic random access memory chips included in said dynamic random access memory without conflicting with execution by said instruction execution circuit of a computer instruction stored by the dynamic memory.
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18. A stored program computer system comprising:
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a dynamic random access memory storing a program having a plurality of computer instructions; a control circuit generating micro-operation signals, said control circuit including (1) a first micro-operation circuit generating instruction execution micro-operation signals and (2) a second micro-operation circuit generating a refresh micor-operation signal; an instruction execution circuit coupled to said first micro-operation circuit and executing computer instructions stored by said dynamic random access memory in response to the instruction execution micro-operation signals; a refresh circuit coupled to said second micro-operation circuit and refreshing said dynamic random access memory in response to the refresh micro-operation signal without conflicting with execution of a computer instruction by said instruction execution circuit.
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19. A stored program computer system comprising:
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an integrated circuit memory address register storing a memory address; an integrated circuit memory address detector generating a memory address detector signal in response to detection of a selected state among a selected plurality of the bits in the memory address; a dynamic memory coupled to receive the memory address detector signal and to store a plurality of computer instructions in response thereto; an instruction execution circuit coupled to execute computer instructions stored by said dynamic memory; and a refresh circuit coupled to refresh said dynamic memory without conflicting with execution by said instruction execution circuit of a computer instruction stored by the dynamic memory.
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20. A stored program computer system comprising:
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a dynamic random access memory storing a program having a plurality of computer instructions and storing computer operands; an instruction execution circuit coupled to the dynamic random access memory and processing the computer operands stored by said dynamic random access memory by executing the computer instructions stored by said dynamic random access memory; and a refresh circuit coupled to refresh said dynamic random access memory without conflicting with execution by said instruction execution circuit of a computer instruction stored by the dynamic memory.
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21. A stored program computer system comprising;
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a dynamic memory storing a program having a plurality of computer instructions; an instruction execution circuit coupled to execute computer instructions stored by said dynamic memory; and a refresh circuit coupled to refresh said dynamic memory without conflicting with execution of a computer instruction by said instruction execution circuit by disabling execution of the computer instructions stored by said dynamic memory during refreshing of said dynamic memory.
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22. A stored program computer system comprising:
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a dynamic random access memory storing a program having a plurality of computer instructions; an instruction execution circuit coupled to execute computer instructions stored by said dynamic memory; and a refresh circuit coupled to refresh said dynamic random access memory without conflicting with execution of a computer instruction by said instruction execution circuit by inhibiting execution of the computer instructions stored by said dynamic random access memory during refreshing of said dynamic random access memory.
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25. A digital processor system comprising:
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an oscillator circuit generating an oscillator signal; a clock gating flip-flop coupled to receive the oscillator signal and generating a clock gating signal in response thereto; a gate coupled to receive the oscillator signal and the clock gating signal, the gate generating a gated clock signal in response to the oscillator signal generated by said oscillator circuit and the clock gating signal generated by said clock gating flip-flop; and a digital processor receiving the gated clock signal and processing digital data in response to the gated clock signal. - View Dependent Claims (26, 27)
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28. An integrated circuit digital processor comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one selected state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit random access memory coupled to receive the memory address detector signal and to store digital data in response thereto; and an integrated circuit digital processor coupled to the integrated circuit random access memory and processing the digital data stored by said integrated circuit random access memory.
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29. An integrated circuit digital processor comprising;
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one selected state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit address decoder coupled to said integrated circuit memory address register and generating a plurality of decoded address signals in response to the memory address stored by said integrated circuit memory address register; an integrated circuit random access memory coupled to receive the memory address detector signal and to store digital data in response thereto;
said integrated random access memory including a plurality of integrated circuit random access memory chips storing the digital data;
wherein each of said plurality of integrated circuit random access memory chips is selected by at least one of the plurality of decoded address signals generated by said address decoder; andan integrated circuit digital processor coupled to the integrated circuit random access memory and processing the digital data stored by a selected integrated circuit random access memory chip included in said integrated circuit random access memory in response to a decoded address signal generated by said address decoder.
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30. An integrated circuit digital processor comprising:
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an integrated circuit read only memory storing computer instructions; an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one selected state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit random access memory coupled to receive the memory address detector signal and store digital data in response thereto; and an integrated circuit digital processor coupled to the integrated circuit read only memory and to the integrated circuit random access memory and processing the digital data stored by said integrated circuit random access memory in response to the instructions stored by said integrated circuit read only memory.
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31. An integrated circuit digital processor comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one selected state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit random access memory coupled to receive the memory address detector signal and store digital data in response thereto; an integrated circuit digital processor coupled to the integrated circuit random access memory and processing the digital data stored by said integrated circuit random access memory; and an integrated circuit refresh circuit coupled to the random access memory and to the integrated circuit digital processor and refreshing the digital data stored therein in response to the processing of the digital data stored by said integrated circuit random access memory.
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32. An integrated circuit digital processor comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one selected state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit random access memory coupled to receive the memory address detector signal and store digital data in response thereto; and an integrated circuit digital processor coupled to the integrated circuit random access memory and processing the digital data stored by said integrated circuit random access memory; and an integrated circuit refresh circuit coupled to the integrated circuit random access memory and refreshing the digital data stored therein in response to the processing of the digital data stored by said integrated circuit random access memory to prevent conflict with the processing of the digital data by said integrated circuit digital processor. - View Dependent Claims (44)
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33. A stored program digital processor comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of at least one predetermined state of, but not all states of, the plurality of more significant bits in the memory address; an integrated circuit random access memory coupled to receive the memory address detector signal, the memory storing a program having a plurality of computer instructions and storing computer operands in response to receipt of the memory address detector signal generated by said integrated circuit memory address detector; and an integrated circuit digital processor coupled to the random access memory, the digital processor processing the computer operands stored by said integrated circuit random access memory in response to the computer instructions stored by said integrated circuit random access memory.
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34. A stored program digital computer comprising:
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an integrated circuit dynamic memory storing a computer program having a plurality of computer instructions and storing computer operands; integrated circuit execution logic coupled to the dynamic memory and executing computer instructions stored by said integrated circuit dynamic memory, said integrated circuit execution logic processing computer operands stored by said integrated circuit dynamic memory in response to execution of the stored computer instructions, said integrated circuit execution logic including an integrated circuit sequential logic circuit generating a sequence of control signals in response to execution of a stored computer instruction; and an integrated circuit refresh circuit coupled to the dynamic memory, the refresh circuit refreshing the computer instructions and the computer operands stored by said integrated circuit dynamic memory in response to at least one of the sequence of control signals generated by said integrated circuit sequential logic circuit. - View Dependent Claims (35, 36, 37, 38, 39)
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40. A stored program digital computer comprising:
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an integrated circuit dynamic random access memory storing a computer program having a plurality of computer instructions and storing computer operands; integrated circuit execution logic coupled to the integrated circuit dynamic random access memory and executing computer instructions stored by said integrated circuit dynamic random access memory, the integrated circuit execution logic processing computer operands stored by said integrated circuit dynamic random access memory in response to execution of the stored computer instructions, the integrated circuit execution logic including an integrated circuit sequential logic circuit generating a sequence of control signals in response to execution of a stored computer instruction; an integrated circuit refresh circuit coupled to the integrated circuit dynamic random access memory, the refresh circuit refreshing the computer instructions and the computer operands stored by said integrated circuit dynamic random access memory in response to at least one of the sequence of control signals generated by said integrated circuit sequential logic circuit; and a disable circuit coupled to disable the processing of the computer operands by said integrated circuit execution logic during refresching of the computer instructions and the computer operands stored by said integrated circuit dynamic random access memory.
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41. A stored program digital computer comprising:
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an integrated circuit memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; and an integrated circuit memory address detector coupled to the memory address register and generating a memory address detector signal in response to detection of the plurality of more significant bits in the memory address; a dynamic integrated circuit memory coupled to receive the detector signal and storing a computer program having a plurality of computer instructions and storing computer operands in response thereto; integrated circuit execution logic coupled to the dynamic integrated circuit memory and executing computer instructions stored by said dynamic integrated circuit memory, the execution logic processing computer operands stored by said dynamic integrated circuit memory in response to the stored instructions, said integrated circuit execution logic including an integrated circuit sequential logic circuit generating a sequence of control signals in response to execution of a stored computer instruction; and an integrated circuit refresh circuit coupled to the dynamic integrated circuit memory, the refresh circuit refreshing the computer instructions and the computer operands stored by said integrated circuit dynamic memory in response to at least one of the sequence of control signals generated by said integrated circuit sequential logic circuit.
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42. An integrated circuit stored program digital computer comprising:
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a dynamic integrated circuit memory storing a computer program having a plurality of computer instructions and storing a plurality of computer operands; integrated circuit execution logic coupled to the dynamic integrated cirucit memory, the execution logic executing the computer instructions stored by said dynamic integrated circuit memory and processing the computer operands stored by said dynamic integrated circuit memory in response to said instructions; and an integrated circuit refresh circuit coupled to the dynamic integrated circuit memory and to the execution logic, the refresh circuit refreshing the computer instructions and the computer operands stored by said dynamic integrated circuit memory in response to execution by the execution logic of at least one stored computer instruction. - View Dependent Claims (43, 45, 46, 47, 48, 49)
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50. An integrated circuit stored program digital computer system comprising:
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a memory address register storing a memory address having a plurality of less significant bits and having a plurality of more significant bits; and a memory address detector coupled to said memory address register and generating a memory address detector signal in response to detection of the plurality of more significant bits in the memory address; a dynamic integrated circuit random access memory coupled to said memory address detector and storing a computer program having a plurality of computer instructions and storing a plurality of computer operands in response to the memory address detector signal. integrated circuit execution logic coupled to the dynamic integrated circuit random access memory, the execution logic executing the computer instructions stored by said dynamic integrated circuit random access memory and processing the computer operands stored by said dynamic integrated circuit memory in response to said instructions; and an integrated circuit refresh circuit coupled to the dynamic integrated circuit random access memory and to the execution logic, the refresh circuit refreshing the computer instructions and the computer operands stored by said dynamic integrated circuit random access memory in reponse to execution by the execution logic of at least one stored computer instruction.
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51. A data processor system comprising:
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an integrated circuit dynamic memory storing computer operands, the dynamic memory including a refresh circuit refreshing data stored therein in response to a memory refresh signal; an integrated circuit read only memory storing computer instructions and computer operands; and integrated circuit execution logic coupled to the dynamic memory and to the read only memory and executing the computer instructions stored by said read only memory, said integrated circuit execution logic including; (a) a first processing logic circuit coupled to the read only memory and transferring to a computer instruction stored by said read only memory at an address indicated by an instruction address operand stored by said read only memory in response to execution of a multiple-byte transfer computer instruction stored by said read only memory, (b) a second processing logic circuit coupled to the dynamic memory and to the read only memory and transferring to a computer instruction stored by said read only memory at an address indicated by an instruction address operand stored by said dynamic memory in response to execution of a single-byte transfer computer instruction stored by said read only memory, and (c) a refresh circuit generating the memory refresh signal in response to execution of at least one of the computer instructions stored by said read only memory.
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52. An integrated circuit stored program computer comprising:
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an integrated circuit dynamic memory storing a program of computer instructions and storing computer operands; integrated circuit execution logic coupled to the dynamic memory and executing the computer instructions stored by said integrated circuit dynamic memory, said integrated circuit execution logic including a processing logic circuit processing the computer operands stored by said dynamic memory in response to execution of at least one of the computer instructions stored by said integrated circuit dynamic memory; and a refresh circuit coupled to the dynamic memory and to the execution logic and refreshing the computer instructions and the computer operands stored by said integrated circuit dynamic memory in response to execution by the execution logic of at least one of the computer instructions stored by said integrated circuit dynamic memory. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 69)
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67. A data processing system comprising:
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an integrated circuit read only memory storing processor instructions; an integrated circuit dynamic memory storing processed information in response to a memory refresh signal; and an execution circuit coupled to the read only memory and to the dynamic memory and executing the instructions stored by said read only memory, said execution circuit including (a) a processing logic circuit processing the information stored by said dynamic memory in response to execution of an instruction stored by said read only memory and (b) a synchronization circuit generating the memory refresh signal in synchronization with and in response to execution of an instruction stored by said read only memory. - View Dependent Claims (68, 71, 72, 73)
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70. A data processing system comprising:
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an integrated circuit read only memory storing processor instructions; an integrated circuit dynamic memory storing processed information in response to a memory refresh signal; and an execution circuit coupled to the read only memory and to the dynamic memory and executing the instructions stored by said read only memory, said execution circuit including (a) a micro-operation circuit generating a plurality of sequential micro-operations in response to an instruction stored by said read only memory, (b) a processing logic circuit coupled to said dynamic memory and to said micro-operation circuit and processing the information stored by said dynamic memory by execution of the plurality of sequential micro-operations, and a synchronization circuit coupled to said said processing logic circuit and generating the memory refresh signal in synchronization with and in response to execution of an instruction responsive micro-operation.
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74. A data processing system comprising:
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an integrated circuit read only memory storing processor instructions; an integrated circuit dynamic memory storing processed information in response to a memory refresh signal; and an execution circuit coupled to the read only memory and to the dynamic memory and executing the instructions stored by said read only memory, said execution circuit including (a) a micro-instruction logic circuit executing a plurality of micro-instructions in response to execution of an instruction stored by said read only memory, (b) a processing logic circuit processing the information stored by said dynamic memory in response to execution of at least one of the instruction responsive micro-instructions generated by said micro-instruction logic circuit, and (c) a synchronization circuit generating the memory refresh signal in response to execution of an instruction responsive micro-instruction.
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75. A stored program computer comprising:
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a main memory storing computer instructions; an alterable integrated circuit memory storing alterable information in response to a refresh signal; and an execution circuit coupled to the main memory and to the alterable integrated circuit memory, the execution circuit executing the computer instructions stored by said main memory, said execution circuit including (a) a control circuit generating a sequence of control signals in response to execution of an instruction stored by said main memory wherein at least one of said sequence of control signals is the refresh signal, and (b) a processing circuit processing the information stored by said alterable integrated circuit memory in response to at least one of the control signals in the sequence of control signals generated by said control circuit. - View Dependent Claims (76, 77, 78)
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79. A digital processing system comprising:
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a dynamic memory storing digital data; a digital processor coupled to the dynamic memory and communicating data with the dynamic memory; a refresh circuit coupled to refresh the dynamic memory in response to a refresh signal; and a control circuit coupled to communicate the refresh signal to the refresh circuit, the control circuit generating the refresh signal at selected intervals of time.
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80. A digital processing system comprising:
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a dynamic memory storing digital data; a digital processor coupled to the dynamic memory and communicating data with the dynamic memory; a refresh circuit coupled to refresh the dynamic memory in response to a refresh signal and to inhibit communication of data between the dynamic memory and the digital processor while the dynamic memory is being refreshed; and a control circuit coupled to communicate the refresh signal to the refresh circuit, the control circuit generating the refresh signal at selected intervals of time.
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81. A digital processing system comprising:
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a dynamic memory storing digital data; a processor coupled to communicate data between the processor and the dynamic memory; and a refresh circuit coupled to refresh the dynamic memory with sufficient frequency to retain the data stored by the dynamic memory.
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82. A digital processing system comprising:
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a dynamic memory storing digital data; a processor coupled to communicate data between the processor and the dynamic memory; and a refresh circuit coupled to refresh the dynamic memory with sufficient frequency to retain the data stored by the dynamic memory and to inhibit communication of data between the dynamic memory and the processor while the dynamic memory is being refreshed.
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Specification