Replaceable Printer Component Including a Memory Updated Atomically

• US 20110134479A1
• Filed: 05/29/2008
• Published: 06/09/2011
• Est. Priority Date: 05/29/2008
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Refstrup, Jacob Grundtvig
• Granted Patent: US 9,007,622 B2
• Time in Patent Office: Days
• US Class Current: 358/1.15
• CPC Class Codes: B41J 2/17546 electronically
• CPC Class Codes: B41J 29/38 Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
• CPC Class Codes: G03G 15/0855 the concentration being measured by optical means
• CPC Class Codes: G03G 15/0865 Arrangements for supplying new developer
• CPC Class Codes: G03G 15/0891 for conveying or circulating developer, e.g. augers
• CPC Class Codes: G03G 21/1882 details of the communication with memory, e.g. wireless communication, protocols
• CPC Class Codes: G03G 2215/0697 being an electronically readable memory
• CPC Class Codes: G03G 2221/1823 Cartridges having electronically readable memory
• CPC Class Codes: Y10S 707/99938 Concurrency, e.g. lock management in shared database
• CPC Class Codes: Y10S 707/99952 Coherency, e.g. same view to multiple users
• CPC Class Codes: Y10S 707/99953 Recoverability

Abstract

A replaceable printer component includes a memory device and a communication link. The memory device includes a memory and a circuit configured to atomically update data stored in the memory. The communication link is configured to communicatively link the memory device to a printer controller when the replaceable printer component is installed in a printing system. The circuit is configured to receive a write request including data, a data length, and an address from the printer controller; copy the data length of data stored at the address to a backup area of the memory; store the data length and the address in the memory; set a write state stored in the memory to a first state; update the data length of data stored at the address with the received data; and set the write state stored in the memory to a second state.

Claims

1. A replaceable printer component comprising:

a memory device including a memory and a circuit configured to atomically update data stored in the memory; and

a communication link configured to communicatively link the memory device to a printer controller when the replaceable printer component is installed in a printing system,

wherein the circuit is configured to;

receive a write request including data, a data length, and an address from the printer controller;

copy the data length of data stored at the address to a backup area of the memory;

store the data length and the address in the memory;

set a write state stored in the memory to a first state;

update the data length of data stored at the address with the received data; and

set the write state stored in the memory to a second state.

2. The replaceable printer component of claim 1, wherein the circuit is configured to:

read the write state stored in the memory in response to powering up the memory device;

read the stored data length and the stored address from the memory; and

copy the data length of data stored in the backup area of the memory to the address in response to the write state being set to the first state.

3. The replaceable printer component of claim 1, wherein the circuit is configured to encode the write state stored in the memory using an error detection or correction scheme.

4. The replaceable printer component of claim 3, wherein the circuit is configured to:

read the write state stored in the memory in response to powering up the memory device;

determine whether the write state is valid based on the error detection or correction scheme; and

set the write state stored in the memory to the second state in response to determining that the write state is invalid.

5. The replaceable printer component of claim 1, wherein the circuit is configured to receive a write request including a data length of up to a size of a page of the memory.

6. The replaceable printer component of claim 5, wherein the backup area of the memory has a length of twice the size of a page of the memory.

7. The replaceable printer component of claim 1, wherein the replaceable printer component comprises one of an inkjet cartridge, an inkjet printhead assembly, a toner cartridge, and an ink supply.

8. The replaceable printer component of claim 1, wherein the replaceable printer component comprises a peripheral device of the printing system.

9. The replaceable printer component of claim 1, wherein the circuit is configured to receive a write request including a data length of up to 64-bytes.

10. The replaceable printer component of claim 1, wherein the memory comprises a non-volatile memory.

11. A replaceable printer component comprising:

means for storing data in the replaceable printer component;

means for communicatively linking the means for storing to a printer controller when the replaceable printer component is installed in a printing system; and

means for atomically updating data in the means for storing data in response to a write request from the printer controller.

12. The replaceable printer component of claim 11, wherein the means for atomically updating the data comprises:

means for receiving data, a data length, and an address where the data is to be written in the means for storing data;

means for backing up the data length of data stored at the address;

means for storing the data length and the address in the means for storing data;

means for setting a write state stored in the means for storing data to a first state;

means for updating the data length of data stored at the address with the received data; and

means for setting the write state stored in the means for storing data to a second state.

13. The replaceable printer component of claim 12, further comprising:

means for reading the write state in response to powering up the replaceable printer component;

means for reading the stored data length and the stored address; and

means for restoring the data length of data to the address in response to the write state being set to the first state.

14. The replaceable printer component of claim 12, further comprising:

means for reading the write state in response to powering up the replaceable printer component; and

means for determining whether the write state is valid.

15. A replaceable printer component comprising:

a supply of one of ink and toner;

a memory device including a memory and a circuit configured to atomically update data stored in the memory; and

a communication link configured to communicatively link the memory device to a printer controller when the replaceable printer component is installed in a printing system,

wherein the circuit is configured to;

receive a write request including data, a data length, and an address from the printer controller;

copy the data length of data stored at the address to a backup area of the memory;

store the data length and the address in the memory;

set a write state stored in the memory to a first state;

update the data length of data stored at the address with the received data;

set the write state stored in the memory to a second state;

read the write state stored in the memory in response to powering up the memory device;

read the stored data length and the stored address from the memory; and

copy the data length of data stored in the backup area of the memory to the address in response to the write state being set to the first state.