摘要:
An apparatus comprising a storage circuit, a load circuit and an oscillator circuit. The storage circuit may be configured to store a number of configuration bits configured to provide one or more control signals. The load circuit may be configured to provide a variable magnitude load in response to the one or more control signals. The oscillator circuit may be configured to provide an output signal, where the output signal has (i) a frequency determined in response to the magnitude of the load circuit and (ii) a magnitude generated in response to a current generated in response to an output of a clamp circuit.
摘要:
A programmable circuit for generating a clock signal is disclosed. The present invention provides a clock generator architecture that combines PLL-based clock generator circuitry with an on-chip EPROM in a monolithic clock generator chip. The clock generator allows for electrical configuration of various information including PLL parameters, input thresholds, output drive levels and output frequencies. The various parameters can be configured after the clock generator is fabricated. The parameters can be configured either during wafer sort or after packaging. The clock generator can be erased prior to packaging so programming can be verified.
摘要:
A programmable logic, a memory and a microcontroller. The memory is coupled to the programmable logic circuit via the microcontroller. The programmable logic circuit, the memory and the microcontroller are fabricated as a single integrated circuit.
摘要:
A programmable logic device, a memory device and a microcontroller manufactured on a single integrated circuit chip. In one example, the programmable logic device may comprise one or more macrocells each comprising an input/output macrocell or a buried macrocell. In another example, the programmable logic device may be a complex programmable logic device (CPLD) or a programmable logic array (PLA).
摘要:
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an output signal that ramps between a first and second frequency in response to (i) a first control signal, (ii) a second control signal, and (iii) a first reference signal. The second circuit may be configured to generate the first and second control signals in response to a third control signal having a third frequency. The third frequency may reduce electromagnetic interference generated by the first circuit.
摘要:
A timing crystal oscillator circuit that may be tuned after production. The circuit generally comprises a microprocessor configured to present one or more control signals, one or more load devices that may be activated in response to the control signals and a crystal oscillator for presenting an output signal having a frequency which is generally dependent on the number of load devices activated.
摘要:
A circuit and method implement a configurable clock generator comprising a logic circuit, a configurable matrix and a phase-locked loop. The logic circuit may be configured to generate a plurality of control signals. The configurable matrix may comprise a plurality of interconnections that may be configured to (i) receive the plurality of control signals from the logic circuit and (ii) bus the control signals to the phase-locked loop. The plurality of control signals may control the operation of the phase-locked loop. In one example, the logic circuit may comprise a sea of gates logic array.
摘要:
A circuit for generating an output signal in response to an input signal that propagates over devices operating at various supply voltages. The circuit generally comprises a first device operating in a first voltage, a second device operating in a second voltage and a clamp device coupled to each of the first and second devices. The clamp device generally operates at the second supply voltage, which may cause the output signal to be propagated through the circuit with a minimum distortion.
摘要:
The present invention provides an EPROM bit-line interface with multiple functions. The invention is constructed by combining a bit/sense amplifier with two transparent latches operating on opposite edges of a timing clock. The two transparent latches form a latch and a register for holding the contents of the EPROM during power down. A bit driver is enabled when it is desirable to program the EPROM. The first transparent latch captures the contents of the EPROM when the EPROM is powered down. The first transparent latch also forms the first half of a register for shifting the contents of the EPROM to an external device. The first transparent latch operates on the leading edge of a timing clock. The second transparent latch operates on the trailing edge of a timing clock. By combining two transparent latches in series, a shift register is implemented. The shift register is used to hold the programming information while the EPROM is programmed. The shift register also holds the programming information while the contents of the EPROM are read during verification. The contents of the shift register also appear at the output of the EPROM. This eliminates the need for a multiplexer to select between the output of a shift register or the output of an EPROM during functional testing.
摘要:
An apparatus comprising a latch circuit, a non-volatile storage circuit, and a switching circuit. The latch circuit may be configured to be dynamically programmable. The non-volatile storage circuit may be configured to be re-programmable. The switching circuit may be configured to transfer data from (i) the non-volatile memory element into the latch circuit in response to a first control signal and (ii) the latch circuit into the non-volatile memory circuit in response to a second control signal.