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US 11,760,085 B2Granted
Accessing registers of fluid ejection devices
AssigneeHewlett-Packard Development Company, L.P.
InventorsScott A. Linn, James Michael Gardner, Michael W. Cumbie
Life of this patent
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Abstract
An integrated circuit to drive a plurality of fluid actuation devices includes a configuration register, a plurality of interfaces, and control logic. The plurality of interfaces include a mode interface and a data interface. The control logic enables writing to the configuration register in response to a signal on the mode interface transitioning to logic high with a logic high signal on the data interface.
Claims16
An integrated circuit for a fluid ejection device, the integrated circuit comprising:
- a configuration register;
- a plurality of interfaces comprising a mode interface, a fire interface, and a data interface;
- and
- control logic to enable writing to the configuration register in response to a signal on a single mode interface transitioning from logic low to logic high with a logic high signal on a single data interface during the single mode interface transition from logic low to logic high, and a logic low signal on the fire interface,
- wherein the single data interface is to input data to the integrated circuit and output data from the integrated circuit.
2 more elements
A method for accessing a fluid ejection device, the method comprising:
- setting a signal on a single data contact pad of the fluid ejection device to logic high;
- setting a signal on a single fire contact pad of the fluid ejection device to logic low;
- transitioning a signal on a single mode contact pad of the fluid ejection device from logic low to logic high;
- and
- enabling writing to a configuration register of the fluid ejection device in response to transitioning the signal on the single mode contact pad from logic low to logic high with the signal on the single data contact pad logic high during the transition of the signal on the single mode contact pad from logic low to logic high, and the signal on the single fire contact pad logic high,
- wherein the single data contact pad is to input data to the fluid ejection device and output data from the fluid ejection device.
3 more elements
Dependencies are inferred from the claim text.