COMMUNICATION LINE DRIVER PROTECTION CIRCUITRY, SYSTEMS AND METHODS

摘要

Embodiments relate to fault detection comparator circuitry and methods that can operate in conjunction with a power-on-reset (POR) scheme to put a chip into a reliable power-down mode upon fault detection to avoid disrupting the communication bus link such that other connected chips and the host can continue to operate. Power-on of the affected chip can then be carried out when the connection with that chip is restored.

主权项

1. A method comprising:
detecting a loss of voltage to a device by comparing a signal pad voltage with a supply voltage and ground; disabling power-on-reset circuitry of the device and preventing the device from attempting to power on during the loss of voltage; detecting a restoration of voltage to the device; and powering on the device.