Hewlett-Packard

A logic circuitry package includes an interface to communicate with a host and a logic circuit. The logic circuit includes a memory arrangement storing digital signature metadata to facilitate verification of associated signed data. The digital signature metadata includes a schema identifier field storing a schema version number; a key identifier field storing an identifier of a signing key; a plurality of data block address fields, each storing an address corresponding to a data block of a plurality of data blocks over which a digital signature is originally computed; and a plurality of data block length fields corresponding to the plurality of data blocks, each data block length field storing data indicating a length of the corresponding data block. The logic circuit is configured to receive a read request from the host and transmit the digital signature metadata to the host in response to the read request.

A toner refill apparatus is provided. The apparatus includes a memory chip to store information of the toner refill apparatus and error information of an injection process. The error information includes a number of dockings of the toner refill apparatus and/or information indicating whether an error has occurred in the injection process. The memory chip is to store completion information indicating that an injection using the toner refill apparatus has been completed.

An integrated circuit to drive a plurality of fluid actuation devices includes a plurality of first non-volatile memory cells and control logic. Each first non-volatile memory cell stores a customization bit. The control logic configures an operation of the integrated circuit based on the customization bits.

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