Lattice Semiconductor Corporation
INPUT/OUTPUT BUS PROTECTION SYSTEMS AND METHODS FOR PROGRAMMABLE LOGIC DEVICES

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Abstract:

Systems and methods for providing external bus protection for programmable logic devices (PLDs) are disclosed. An example system includes a programmable I/O bus configured to interface with a user device over an external bus interface coupled to a PLD; a bus protection circuit arrangement integrated with the programmable I/O interface and configured to provide I/O bus supply voltage protection for the programmable I/O interface; and a bus protection control signal generator. The bus protection control signal generator generates a default bus protection control signal for the bus protection circuit arrangement of the PLD prior to completion of a power ramp performed by the user device; an intermediate bus protection control signal for the PLD prior to completion of loading a PLD configuration into a PLD fabric of the PLD; and an operational bus protection control signal for the PLD.

Status:
Application
Type:

Utility

Filling date:

27 May 2021

Issue date:

16 Sep 2021