Setting multiple chip parameters using one IC terminal

Abstract

A method for setting multiple chip parameters using one IC terminal is described. The chip comprises a first circuit coupled to the pin for setting a first parameter. A second circuit coupled to the pin sets a second parameter. In addition, a third circuit coupled to the pin sets a third parameter of the chip.

1 . A system, comprising: 
 an external circuit; and    an integrated circuit (IC) having an IC terminal, wherein the IC terminal couples the IC to the external circuit, wherein the IC terminal is used to set a first and a second parameter of the IC.    
   
   
       2 . The system of  claim 1 , wherein the IC comprises a first circuit that determines the value of the first parameter.  
   
   
       3 . The system of  claim 2 , wherein the IC comprises a second circuit that determines the value of the second parameter.  
   
   
       4 . (canceled)  
   
   
       5 . The system of  claim 2 , further comprising: 
 a switch, wherein the switch couples the first circuit to the external circuit to set the first parameter.    
   
   
       6 . The system of  claim 1 , wherein the IC comprises an internal circuit that determines the value of the first and second parameters.  
   
   
       7 . The system of  claim 2 , wherein the first circuit comprises a differential amplifier that compares a voltage as received at the IC terminal with a reference voltage and generates an output value, wherein a logic circuit coupled to the differential amplifier sets the first parameter based on the output value.  
   
   
       8 . A method, comprising: 
 coupling an external circuit having a DC Thevenin equivalent circuit to a terminal of an integrated circuit (IC); and    using the Thevenin voltage and resistance of the external circuit to set two parameters in the IC.    
   
   
       9 - 14 . (canceled)  
   
   
       15 . An integrated circuit (IC), comprising: 
 a means for setting a termination resistance of the IC using an IC terminal; and    a means for setting an equalization current of the IC using the IC terminal.    
   
   
       16 . (canceled)  
   
   
       17 . An integrated circuit (IC), comprising: 
 an IC terminal to couple to the IC to an external circuit; and    an internal circuit coupled to the IC terminal wherein the internal circuit sets a first parameter and a second parameter of the IC.    
   
   
       18 . (canceled)  
   
   
       19 . The IC of  claim 17 , wherein the first parameter is a termination resistance.  
   
   
       20 - 21 . (canceled)  
   
   
       22 . The IC of  claim 17 , wherein the IC terminal is a pin.  
   
   
       23 . The IC of  claim 17 , wherein the IC terminal is a bump.  
   
   
       24 - 30 . (canceled)