Apparatus and methods for improved input/output cells

Details Apparatus and methods for improved input/output cells Apparatus and methods for improved input/output cells

2007-07-03

2007-07-03

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S086000

Reexamination Certificate

active

10614956

ABSTRACT:
Apparatus and methods are provided for improving data exchanges between electronic devices, such as memory controllers and RLDRAMs. An I/O cell includes a signal pad for transferring a first signal to an electronic device coupled thereto and for receiving a second signal from the electronic device. In one aspect, a duty cycle controller is coupled to the signal pad for balancing a duty cycle of the first signal with respect to a clock signal. In another aspect, dynamic switchable termination is coupled to the signal pad for providing termination impedance when the I/O cell is receiving the second signal.

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Micron TN-46-06, Technical Note Termination for Point-to-Point Systems, pp. 1-6-Rev. Jun. 2001, 2001 Micron Technology, Inc., Boise, Idaho.

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