| 摘要 |
The invention provides a printing consumables chip. The printing consumables chip comprises a base plate which is provided with a first electrical contact, a second electrical contact, and an electronic module which connects with the first electrical contact and the second electrical contact. The electronic module comprises a microcontroller, a power circuit, a modulation circuit, and a clock circuit which provides a clock signal to the microcontroller. The modulation circuit comprises a switch device. A control terminal of the switch device is connected with a first pin of the microcontroller and two output terminals of the switch device are connected with the first electrical contact and the ground, respectively. The clock circuit comprises a comparison unit. A first input terminal of the comparison unit is connected with an external clock signal and a second input terminal of the comparison unit is connected with a reference voltage. An output terminal of the comparison unit is connected with the microcontroller. The first pin receives the control signal from the output terminal of the comparison unit, and the control terminal of the switch device is connected with a second pin of the microcontroller.
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