Off-chip driving device and driving capability enhancement method thereof
AssigneeNanya Technology Corporation
InventorChang-Ting Wu
Life of this patent
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Abstract
An off-chip driving device and a driving capability enhancement method thereof are provided. Detecting a rising edge and a falling edge of an input data signal. A first enhancement circuit is controlled to provide a first enhancement signal to an input/output pad according to the rising edge and the falling edge of the input data signal.
Claims13
An off-chip driving device, comprising:
- a driver circuit comprising:
- at least one pull-up driver;
- at least one first resistor coupled between the at least one pull-up driver and an input/output pad;
- a first enhancement circuit coupled to the at least one first resistor;
- and
- a first switching circuit coupled between the first enhancement circuit and the at least one first resistor;
- and
- a control circuit coupled to the at least one pull-up driver and the first enhancement circuit, and detecting a rising edge and a falling edge of an input data signal and controlling the first enhancement circuit to provide a first enhancement signal to the input/output pad according to the rising edge and the falling edge of the input data signal, wherein the first switching circuit is controlled by the control circuit to switch the first enhancement circuit to be connected to the first end of the at least one first resistor, the second end of the at least one first resistor, or the position between the first end and the second end of the at least one first resistor.
A driving capability enhancement method of an off-chip driving device, which comprises at least one pull-up driver, at least one first resistor, a first enhancement circuit, a second enhancement circuit, a pull-down driver, a first switching circuit and at least one second resistor, wherein the at least one first resistor is coupled between the at least one pull-up driver and an input/output pad, the at least one second resistor is coupled between the pull-down driver and the input/output pad, the first enhancement circuit is coupled to the at least one first resistor, and the second enhancement circuit is coupled to the at least one second resistor, the driving capability enhancement method of the off-chip driving device comprising:
- detecting a rising edge and a falling edge of an input data signal:
- controlling the first enhancement circuit and the second enhancement circuit to provide a first enhancement signal and a second enhancement signal to the input/output pad according to the rising edge and the falling edge of the input data signal, to enhance strength of driving signals of the at least one pull-up driver and the pull-down driver;
- and
- controlling the first switching circuit to switch the first enhancement circuit to be connected to a first end of the at least one first resistor, a second end of the at least one first resistor, or a position between the first end and the second end of the at least one first resistor.
Dependencies are inferred from the claim text.