Electronic system having a chip integrated power-on reset circui

Details Electronic system having a chip integrated power-on reset circui Electronic system having a chip integrated power-on reset circui

1997-05-06

2000-07-04

Nguyen, Hoa T.

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

714745, 327143, G01R 3128, H03L 700, G06F 1100

Patent

active

060853425

ABSTRACT:
A power-on reset circuit with glitch sensing capabilities is formed as part of the same integrated circuit chip containing other logical circuits. A port included in the integrated circuit chip enables a power-on reset signal generated by the integrated power-on reset circuit to be output from the chip and applied to other chips installed in a single chip or multi-chip electronic system. The power-on reset circuit compares a capacitor stored reset voltage to a reference voltage and outputs the power-on reset signal when the reset voltage falls below the reference voltage. Storage of the reset voltage by the capacitor is controlled by a glitch sensor which detects changes in voltage provided by a power supply in excess of a given threshold and, in response thereto, triggers a capacitor discharge. This causes the reset voltage to fall below the reference voltage, and the power-on reset signal to be output. Furthermore, for synchronously operated systems, the output power-on reset signal is synchronized with an edge of an output clock signal.

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