Replaceable printer component including a memory updated atomically

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 and an address from the printer controller;
• copy data stored at the address to a backup area of the memory;
• set a write state stored in the memory to a first state;
• update the data stored at the address with the received data;
• and
• set the write state stored in the memory to a second state;
• wherein the circuit is further configured to:
• encode the write state stored in the memory using an error detection or correction scheme;
• 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.

A method of storing data atomically on 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 method comprises:
• receiving a write request including data and an address from the printer controller;
• copying the data stored at the address to a backup area of the memory;
• setting a write state stored in the memory to a first state which indicates that the received data from the write request has not yet been successfully written to the address;
• updating data stored at the address with the received data;
• encoding the write state stored in the memory using an error detection or correction scheme;
• reading the write stated stored in the memory in response to powering up the memory device;
• determining whether the write state is valid based on the error detection or correction scheme;
• and,
• then, setting the write state stored in the memory to a second state in response to determining that the write state is invalid.