performing calibration on flex input output signals on {HEAD ~ a first cell processor} of said plurality of cell processors and {TAIL ~ said first input output controller} of said plurality of input output controllers, 
performing calibration on flex input output signals on { HEAD ~ a first cell processor } of said plurality of cell processors and { TAIL ~ said first input output controller } of said plurality of input output controllers ,
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH