Patent ID: 11940742
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus to which a cartridge that includes a cartridge substrate including a memory is attachable, the image forming apparatus comprising:
a main body electrical substrate;
a main body ground terminal electrically connected to the main body electrical substrate, the main body ground terminal being configured to take a ground voltage;
a first main body terminal electrically connected to the main body electrical substrate, the first main body terminal being configured to transmit one of a power supply voltage higher than the ground voltage, a data signal that indicates information written into the memory or read out from the memory, and a synchronization signal taking a timing of the data signal;
a second main body terminal electrically connected to the main body electrical substrate, the second main body terminal being configured to transmit remaining two of the power supply voltage, the data signal, and the synchronization signal; and
a main body frame to which the cartridge is attachable, wherein
the cartridge substrate includes:
a cartridge ground terminal electrically connected to the main body ground terminal in a state where the cartridge is attached to the main body frame;
a first cartridge terminal electrically connected to the first main body terminal in the state; and
a second cartridge terminal electrically connected to the second main body terminal in the state,

wherein the memory includes a timer configured to generate a clock signal, and
wherein the synchronization signal is a reset signal for resetting the timer.