Select line SELn and SELn' are also raised to the voltage Vpp and the word line WLi is raised to Vpp. Since the select lines serve only to activate the sources of the transistors being programmed through, for example, select transistors Qn(j-1) and Qn'(j-1) there is an option to have Vcc rather than Vpp on the gates of select transistors Qn(j-1) and Qn'(j-1).