摘要:
Low-frequency digital data input signals in an integrated circuit are controlled between first and second stages in a signal input path of the integrated circuit by a capacitance in the signal input path between the first and second stages. The capacitance is sized to attenuate high-frequency noise in the signal input path. In one embodiment, the integrated circuit may be an input buffer circuit in which the capacitance is a capacitor between the signal input path and a reference potential, a voltage source, or both. In another embodiment, the integrated circuit may be an oscillator circuit in which the capacitance is provided between corresponding elements of a differential pair of transistors in the first stage.
摘要:
A time-out period is established for a watchdog timer. The time-out period is restarted each time a designated key value is received when each key value is received in a proper sequence. An error is indicated if set of key values is received in an incorrect sequence. A time-out is indicated if a correct sequence of key values is not received within the time-out period.
摘要:
An electronic circuit includes a microcontroller processor (410), a peripheral (420) coupled with the processor, an endian circuit (470) coupled with the processor and the peripheral to selectively provide different endianess modes of operation, and a detection circuit (140) to detect a failure to select a given endianess, whereby inadvertent switch of endianess due to faults is avoided. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.
摘要:
A time-out period is established for a watchdog timer. The time-out period is restarted each time a designated key value is received when each key value is received in a proper sequence. An error is indicated if set of key values is received in an incorrect sequence. A time-out is indicated if a correct sequence of key values is not received within the time-out period.
摘要:
An electronic circuit includes a microcontroller processor (410), a peripheral (420) coupled with the processor, an endian circuit (470) coupled with the processor and the peripheral to selectively provide different endianess modes of operation, and a detection circuit (140) to detect a failure to select a given endianess, whereby inadvertent switch of endianess due to faults is avoided. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.
摘要:
A modulation evaluation system associated with frequency modulations periods of a phase-locked loop is described. The system includes a first accumulator for accumulating clock edges a window of the frequency modulation periods; a second accumulator coupled to the first accumulator and operative for accumulating clock edges during whole periods of the frequency modulation periods; a dynamic enable control coupled to a first input associated with the first accumulator and a second input associated with the second accumulator, wherein the dynamic enable control selectively transmits a first enable signal that controls when the first accumulator accumulates clock edges and a second enable signal controls when the second accumulator accumulates clock edges, and accumulating clock edges enable modulation evaluation during production.