Programmable logic device multispeed I/O circuitry

Details Programmable logic device multispeed I/O circuitry Programmable logic device multispeed I/O circuitry

2006-11-14

2006-11-14

Jeanpierre, Peguy (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Having details of setting or programming of interconnections...

C326S037000, C326S039000, C326S041000, C365S063000

Reexamination Certificate

active

07135887

ABSTRACT:
Programmable logic device integrated circuitry having I/O circuitry portions having different maximum speed capabilities and different amounts of programmability for supporting various I/O signaling standards is provided. High-speed I/O circuitry and low-speed I/O circuitry may be provided. The high-speed I/O circuitry may have differential I/O drivers and may not be programmable. Relatively few I/O lines may be connected to the high-speed I/O circuitry. The low-speed I/O circuitry may be programmable so that a user may configure the low-speed I/O circuitry to support different I/O signaling standards. Intermediate-speed I/O circuitry may be provided that is more flexible than the high-speed circuitry and operates at higher maximum I/O data rates than the low-speed I/O circuitry. Transmitter circuitry (output driver circuitry) in the I/O circuitry may be provided with the ability to handle a greater number of different I/O signaling standards than receiver circuitry (input driver circuitry) in the I/O circuitry.

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