CRUM UNIT MOUNTABLE IN CONSUMABLE UNIT OF IMAGE FORMING APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME

摘要

A Customer Replacement Unit Monitor (CRUM) unit which is mountable on an image forming apparatus is provided. The CRUM unit includes a plurality of interfaces configured to be connected to the consumable unit and a power extracting circuit configured to, when a clock signal is received through one of the plurality of interfaces, extracts power from the clock signal, and the clock signal is a signal where a high value and a low value repeatedly alternate even in an idle section where a data signal is not received. Accordingly, the CRUM unit may operate even in the idle section by extracting power from the high value.

主权项

1. A Customer Replacement Unit Monitor, CRUM, unit which is mountable on a consumable unit of an image forming apparatus, the CRUM unit comprising:
a plurality of interfaces configured to be connected to the consumable unit; a power extracting circuit configured to, when a clock signal is received through one of the plurality of interfaces, extract power from the clock signal; and an interface controller configured to transmit/receive data through at least one of the plurality of interfaces according to the clock signal, wherein the clock signal has a first pulse width in a data section where a data signal is received and has a second pulse width which is different from the first pulse width in an idle section where a data signal is not received.