Processor and switching power supply apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakashi Hara, Koichi Ueki
Life of this patent
Estimating the term…
Abstract
A processor includes analog signal input ports, an A/D conversion unit, and an ALU in a stage subsequent to the A/D conversion unit, separately from a CPU. The ALU not only stores a comparison result in a RAM independently of the CPU, but also compares an output value of the A/D conversion unit with a reference value set in the RAM, and interrupts the CPU or issues a command to a PWM generator in accordance with a flag based on the comparison result. This realizes high-speed processing in accordance with a change in an analog signal, although the processor has a low cost and a low clock frequency overall.
Claims6
A processor comprising:
- digital signal input/output ports;
- analog signal input ports;
- sample/hold circuits arranged to sample and hold voltages of the analog signal input ports;
- an A/D conversion unit arranged to convert a voltage held by the sample/hold circuits to a digital value;
- a CPU;
- and
- a memory arranged to store a program and data, and connected to the CPU via a bus;
- wherein
- a comparison operation unit is provided in a stage subsequent to the A/D conversion unit, the comparison operation unit being arranged to compare an output value of the A/D conversion unit with a reference value stored in advance in the comparison operation unit and to control an output value of a predetermined port of the input/output ports in accordance with a result of the comparison.
Dependencies are inferred from the claim text.