| 摘要 |
A semiconductor device has a first controlled chip, including a first replica output circuit having the same configuration as a first output circuit, a first ZQ terminal connected to the first replica output circuit, a first through electrode connected to the first ZQ terminal, and a first control circuit which sets the impedance of the first replica output circuit. A control chip includes a second ZQ terminal connected to the first through electrode, a comparator circuit which compares a voltage of the second ZQ terminal with a reference voltage, and a second control circuit 123 which performs a process based on a comparison by the comparator circuit. The first control circuit and the second control circuit receive a common input signal to operate and sequentially change and set the impedance until the comparison result changes when an external resistance element is connected to the second ZQ terminal. |
| 主权项 |
1. A device comprising:
a first controlled chip; and a control chip operable to control the first controlled chip, the first controlled chip being stacked on the control chip, the first controlled chip comprising:
a first output circuit,a first replica output circuit having the same configuration as the first output circuit,a first ZQ terminal electrically connected to the first replica output circuit,a first through electrode connected to the first ZQ terminal, the first through electrode extending through the first controlled chip, anda first control circuit operable to set an impedance of the first replica output circuit, the control chip comprising:
a second ZQ terminal connected to the first through electrode,a comparator circuit operable to compare a voltage of the second ZQ terminal with a reference voltage,a second control circuit operable to perform a process according to a comparison result from the comparator circuit, anda DQ input/output circuit operable to receive data from and transmit data to the first output circuit, wherein the first control circuit and the second control circuit receive a common input signal to operate, adjust the impedance of the first replica output circuit according to the comparison result in a state in which an external resistance element is connected to the second ZQ terminal, and set the adjusted impedance to the first output circuit.
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