SYSTEM FOR ENABLING EXTERNAL OSCILLATORS IN SYSTEM-ON-CHIPS
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United States of America Patent
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Issued Date -
May 26, 2022
app pub date -
Nov 24, 2020
filing date -
Nov 24, 2020
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Abstract
An enabling system that includes a controller and processing circuitry, is configured to enable an external oscillator that operates in one of single-ended, differential, and crystal modes. To enable the external oscillator, the controller is configured to detect a mode of operation of the external oscillator, and the processing circuitry is configured to operate in the detected mode. The controller detects the mode of operation of the external oscillator by sequentially initializing the processing circuitry to operate in the single-ended, differential, and crystal modes, and determining whether the current operating mode of the processing circuitry is same as the mode of operation of the external oscillator based on a clock signal outputted by the processing circuitry during the corresponding mode.
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