Hewlett-Packard Development Company, L.p.

Brendan Hall

Boon Bing Ng

Mohan Kumar Sudhakar

Rui Pan

John Oliver

Aidan O'Reilly

Garry Rooney

Stephen Byrne

Michael Dineen

Erik D Ness

Huston W Rice

Mark Walsh

Tommy O'Connor

Willie Sheehan

David B Novak

John Mulrennan

In some examples, a circuit includes a data line, an input line, a first memory element, and a decoder to receive an address and to enable the first memory element for access in response to the address. The selector is responsive to the data line to select the first memory element, where the selector is to select the first memory element responsive to the data line having a first value, and where the data line is to communicate data of a second memory element in response to the second memory element being enabled for access. The input line is to communicate data of the first memory element in response to the first memory element being selected by the selector.

Selectors for memory elements

In some examples, a circuit for use with a memory element and a nozzle for outputting fluid, includes a data line, a fire line, and a selector responsive to the data line to select the memory element or the nozzle. The selector is to select the memory element responsive to the data line having a first value, and to select the nozzle responsive to the data line having a second value different from the first value. The fire line is to control activation of the nozzle in response to the nozzle being selected by the selector, and to communicate data of the memory element in response to the memory element being selected by the selector.

Selectors for nozzles and memory elements

In some examples, a system includes a plurality of fluid ejection devices, a fluid ejection controller, and a plurality of data lines shared by the plurality of fluid ejection devices and connected between the fluid ejection controller and the plurality of fluid ejection devices. A first data line of the plurality of data lines communicates data of a first memory of a first fluid ejection device of the plurality of fluid ejection devices, and a second data line of the plurality of data lines communicates data of a second memory of the first fluid ejection device.

Data lines to fluid ejection devices

In an embodiment, an authentication system includes a supply device having a data storage chip with identification (ID) bit memory cells. The ID bit memory cells comprising a measured cell, pointer cells to store address information that points to the measured cell, and analog cells that store factory-measured analog information about the measured cell.

Identification bit memory cells in data storage chip

In one example a replaceable tri-color ink cartridge housing includes three chambers for different colors ink. In a further example, a headland may have three parallel ink slots having a length of at least 14.4 millimeters.

Tri-color ink cartridge housing

Encryption of fluid cartridges for use with imaging devices is disclosed herein. One disclosed apparatus includes a memory of a fluid cartridge comprising a plurality of sequential bits, where the plurality of sequential bits are written to the memory after the plurality of sequential bits are transformed based on scrambling bits of the plurality of sequential bits, and a memory interface of the fluid cartridge to enable access to the memory to authenticate the fluid cartridge.

Encryption of fluid cartridges for use with imaging devices

A replaceable tri-color ink cartridge, comprising three chambers for different colors ink; a headland having headland slots each fluidically connected to a respective chamber; and a printhead die attached to the headland, the die including (i) nozzle arrays having a length of at least 14.3 millimeters, and (ii) feed slots that fluidically connect the headland slots to the respective nozzle arrays, wherein each headland slot is longer than the corresponding feed slot.

Growing community of inventors

Leixlip, Ireland

Brendan Hall