Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2007-04-10
2007-04-10
Chowdhury, Tarifur (Department: 2112)
Electronic digital logic circuitry
Interface
Current driving
C326S086000, C326S038000, C326S039000, C326S041000
Reexamination Certificate
active
11295260
ABSTRACT:
A circuit coupled to an input-output bond pad (I/O pad) in an integrated circuit including an input buffer, an output buffer and a pad management circuit. The pad management circuit receives a first data signal, a first output enable signal, and a configuration signal indicative of the connection state of the I/O pad, and generates a second data signal and a second output enable signal. When the configuration signal indicates the I/O pad is to be connected to a package pin, the pad management circuit couples the first data signal as the second data signal and couples the first output enable signal as the second output enable signal. When the configuration signal indicates the I/O pad is to be left unconnected, the pad management circuit asserts the second output enable signal and generates the second data signal having a predetermined value.
REFERENCES:
patent: 6020757 (2000-02-01), Jenkins, IV
patent: 6072728 (2000-06-01), Merritt
patent: 6577157 (2003-06-01), Cheung et al.
patent: 6677781 (2004-01-01), Ishikawa et al.
patent: 2003/0107908 (2003-06-01), Jang et al.
Chowdhury Tarifur
Cook Carmen C.
Latif Mohammad A.
Micrel Inc.
Patent Law Group LLP
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