HP P3005 manual Print cartridge memory system, Write

Print cartridge memory system

The memory tag is a nonvolatile memory built into the print cartridge. The cartridge usage condition is detected as the engine controller reads or writes the data stored on the memory tag. The engine controller renews the information in the prescribed timing and reads or writes it from or to the memory tag.

The engine controller commands the memory tag to read or write with the following conditions:

●Read

●Power is on.

●The cartridge door is closed.

●A command has been received from the formatter.

●Write

●A page of media is printed.

●A command has been received from the formatter.

When the engine controller fails to read or write three times in a row, it determines that the memory tag is abnormal and sends a cartridge memory abnormality warning to the formatter.

Figure 4-18Print cartridge memory tag

ENWW Print cartridge memory system 61