Control circuit for power voltage
AssigneeWinbond Electronics Corp.
InventorCheng-Chih Wang
Life of this patent
Estimating the term…
Abstract
A power voltage control circuit for a CPU. The CPU has at least one power indication pin to output a power indication signal. In the control circuit, a register stores an adjustment signal, and combination unit adds the power indication signal and the adjustment signal to output a first signal. A selection unit receives the power indication signal and the adjustment signal. A selection controller controls the selection unit to output the power indication signal or the adjustment signal. A PWM controller supplies a power voltage to the CPU according to the power indication signal or the adjustment signal from the selection unit.
Claims13
A power voltage control circuit for a CPU, wherein the CPU has at least one power indication pin to output a power indication signal, the control circuit comprising:
- a selection unit having a first input terminal coupled to the power indication pin, a second input terminal and a control terminal;
- a register to store an adjustment signal;
- a combination unit to produce a first signal and output to the second terminal of the selection unit according to the power indication signal and the adjustment signal;
- a selection controller to output a selection signal to the control terminal of the selection unit, such that the selection unit outputting one power indication signal and the first signal;
- and
- a PWM controller coupled to the selection unit to produce a power voltage to the CPU according to the power indication signal or the first signal.
A control circuit for power voltage of a CPU, wherein the CPU has at least one power indication pin to output a power indication signal, and the CPU adjusts the power indication signal according to load and operating temperature thereof, the control circuit comprising:
- a selection unit having a first input terminal coupled to the power indication pin, a second input terminal and a control terminal;
- a combination unit to produce a first signal and output to the second terminal of the selection unit according to the power indication signal and an adjustment signal;
- a selection controller to output a selection signal to the control terminal of the selection unit, such that the selection unit outputting one power indication signal and the first signal;
- and
- a PWM controller coupled to the selection unit to supply a power voltage to the CPU according to the power indication signal or the first signal.
Dependencies are inferred from the claim text.