Chip for operating in multi power conditions and system having the same
AssigneeMagnaChip Semiconductor, Ltd.
InventorHong-Joo Park
Life of this patent
Estimating the term…
Abstract
An apparatus for controlling an I/O interface of a chip operated in multi-power conditions includes an enable signal generator for generating an enable signal based on a chip power down signal; a reference voltage generator for generating a predetermined reference voltage in response to the enable signal; a comparator for determining a voltage required for operating the chip by comparing an external power voltage with the reference voltage in response to the enable signal; and an input/output means for performing an I/O interface function based on the voltage determined according to the comparison result of the comparator.
Claims13
An apparatus for controlling an I/O interface of a chip operated in multi-power conditions, comprising:
- an enable signal generator for generating an enable signal based on a chip power down signal;
- a reference voltage generator for generating a predetermined reference voltage in response to the enable signal;
- a comparator for determining a voltage required for operating the chip by comparing an external power voltage with the reference voltage in response to the enable signal;
- and
- an input/output means for performing an I/O interface function based on the voltage determined according to the comparison result of the comparator.
A system comprising:
- a power supplier for supplying a multi-power;
- a first chip for operating using the power supplied from the power supplier;
- and
- a second chip for comparing an internal reference voltage with the power supplied from the power supplier to determine a voltage for the first and the second chips, the second chip operating to interface with the first chip by using the determined voltage,
- wherein the second chip includes:
- an enable signal generator for generating an enable signal using a chip power down signal;
- a reference voltage generator for generating a predetermined reference voltage in response to the enable signal;
- a comparator for storing the enable signal for a predetermined time and determining a voltage required for operating the chip by comparing the reference voltage with an external power voltage in response to the enable signal during the predetermined time, the comparator being automatically turned off after a lapse of the predetermined time;
- and
- an input/output means for performing an interface function using the voltage determined according to the comparison result of the comparator.
Dependencies are inferred from the claim text.