Multiplexing of trim outputs on a trim bus to reduce die size
AssigneeMicron Technology, Inc.
InventorFrankie Fariborz Roohparvar
Life of this patent
Estimating the term…
Abstract
An integrated circuit includes trim circuitry to control operations of internal circuitry. The integrated circuit includes multiplex circuitry for coupling the trim circuitry to internal circuits via a trim bus in a manner which reduces die area. The trim circuitry is controlled such that fuses used to control different level and timing parameters are grouped together and routed across the integrated circuit using the trim bus and multiplex circuit.
Claims20
An integrated circuit comprising:
- trim circuitry which provides output signals to control operations of internal circuitry, the trim circuitry includes a plurality of non-volatile fuse adapted to provide X trim signals;
- a trim bus selectively coupled to the trim circuitry for routing the X trim signals across the integrated circuit, the trim bus comprising Y interconnect lines, where Y is greater than X;
- and
- multiplex circuitry for coupling a group of Y trim signals selected from the X trim signals of the trim circuitry to internal circuits via the trim bus.
A flash memory device comprising:
- trim circuitry which provides output signals to control operations of internal circuitry, the trim circuitry includes a plurality of non-volatile memory cells adapted to provide X trim signals;
- a trim bus selectively coupled to the trim circuitry for routing the X trim signals across the flash memory device, the trim bus comprising Y interconnect lines, where Y is greater than X;
- and
- multiplex circuitry for coupling a group of Y trim signals selected from the X trim signals of the trim circuitry to internal circuits via the trim bus.
A method of reducing interconnect routing in a flash memory device using non-volatile trim circuits, the method comprising:
- providing trim signals from the non-volatile trim circuits;
- selecting a predetermined number of the trim signals based upon an operating state of the flash memory device;
- and
- multiplexing the selected trim signals on common bus lines provided on the flash memory device.
Dependencies are inferred from the claim text.