Patent ID: 6320802
Filing Date: 2001-11-20
Classification: G11C

Abstract:
A program circuit, comprising:a signal generating circuit generating a first trigger signal and a second trigger signal that is delayed by a prescribed time from said first trigger signal;a first internal node;a drive circuit operating by receiving a first power supply potential and a second power supply potential that is different from said first power supply potential for driving a potential of said first internal node,said drive circuit includinga first switch circuit provided in a first path extending from said second power supply potential to said first internal node and attaining one of a conductive state and a shutdown state according to said first trigger signal,a conduction setting element provided in said first path in series with said first switch circuit and configured to be externally set to one of a conductive state and a non-conductive state in a non-volatile manner, anda second switch circuit provided in a second path extending from said first power supply potential to said first internal node and attaining one of a conductive state and a shutdown state, complementarily to said first switch circuit, according to said first trigger signal;a second internal node;a third switch circuit responsive to said second trigger signal for driving said first internal node and said second internal node to one of a conductive state and a shutdown state; anda potential retaining circuit operating by receiving said first and second power supply potentials for retaining a potential level of said second internal node for output.