Cirrus Logic Inc.

William Ip

Kaushik L Popat

David Sherman

Voltage pullup or pulldown devices of general purpose input/output pads of integrated circuit chips are controlled by signals derived from a core of the chip and which indicate (1) if the pad is to be enabled to output a value and (2) the value of the signal to be outputted. Such devices are controlled to supply different current levels to the input/output terminals as a function of whether the chip is operating in 'sleep' and interrupt modes. The device of each pad is disabled when signals or commands are supplied via the pad from the chip to circuitry external to the chip and vice versa.

Growing community of inventors

Saratoga, CA, United States of America

William Ip