Cmos chip to chip settable interface receiver cell

Abstract

A receiver of signals on cross chip boundaries for coupling chips with different coupling requirements allows changing hysteresis settings with changeable inputs to the receiver for connections between chips of different technologies without the need for masking or making a new circuit. The chip hysteresis profile switches from one setting to another based on the input from control logic supplied by a driver output level (DOL) pin input. Thus the receiver for signals on cross chip boundaries on directly connected and for interposer connection situations where chips need to be interconnected allows customization of the hysteresis across the connection. The receiver for chip to chip transitions receives a control input from a device output level control signal. When DOL is in high state it sets for the intermediate hysteresis levels and when it is in the low state it sets for a normal hysteresis level. A receiver enable pin turns the receiver power OFF and sets the output pin at a known deterministic state. The input pin IN takes data from the off chip environment nets providing an input in accordance with the needs of a sending chip and processes the data through the circuit to the output pin. The input levels can be configured to receive the signal sent from a sending chip depending upon the state of the DOL pin.