JPH0555468A - Semiconductor device - Google Patents

Abstract

PURPOSE:To enable stable operation by providing an intake part to receive a power supply from the outside of a semiconductor device separately for an input circuit, an output circuit and a processing circuit, respectively. CONSTITUTION:A device is composed of an input circuit 1 to receive an input signal from the outside, and output circuit 3 to output an output signal to the outside and a processing circuit 2 to carry out a processing based on a signal received by the input circuit 1 and to generate an output signal to the output circuit 3. In this case, intake parts VDD1, VDD2, VDD3 to receive a power supply from the outside of a semiconductor device are provided separately for the input circuit 1, the output circuit 3 and the processing circuit 2, respectively. Thereby, stable operation can be realized without being affected by noised generated from the processing circuit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor device, and more particularly to an intake portion for receiving power from outside the semiconductor device.

[0002]

2. Description of the Related Art An example of a conventional semiconductor device is shown in FIG. In FIG. 2, 1 is an input circuit, 2 is a processing circuit, 3 is an output circuit, VDD3 is a power supply potential intake section for 3, N03 is a power supply potential supply wiring for 3, VSS3 is a ground potential intake section for 3, and N13 is 3. Ground potential supply wiring for VDD4, VDD4 is a common power supply potential supply section for 1 and 2, N04 is a common power supply potential supply wiring for 1 and 2, VSS4 is a common ground potential supply section for N1 and N14 is N1 and 2 Common ground potential supply wiring. As shown in FIG. 2, an independent path for the output circuit is prepared for the power supply potential intake section and the ground potential intake section, and a common power supply potential intake section and ground are provided for the input circuit and the processing circuit. Power was being supplied from the potential intake.

[0003]

In the case of such a power supply form, noise generated from the sense amplifier circuit, the data bus equalize circuit, etc. included in the processing circuit propagates through the common power supply path and enters the input circuit, and the input signal is inputted. It affected the waveform of and caused a malfunction.

The present invention has improved these points and provides a semiconductor device which guarantees stable operation without being affected by noise generated from a processing circuit.

[0005]

The semiconductor device of the present invention comprises:
In a semiconductor device comprising an input circuit that receives an input signal from the outside, an output circuit that outputs an output signal to the outside, and a processing circuit that performs processing based on the signal received by the input circuit to generate an output signal to the output circuit, An intake section for receiving power from outside the semiconductor device is separately provided for the input circuit, the output circuit, and the processing circuit.

[0006]

According to the above configuration of the present invention, even if noise occurs in the processing circuit, the input circuit is not affected by the noise, and malfunctions can be prevented.

[0007]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is an input circuit, 2 is a processing circuit, 3 is an output circuit, and VDD1 is 1
N01 is the power supply line for the power supply, N1 is the power supply for N1
1 is a ground potential supply wire for 1, VDD2 is a power supply potential supply part for 2, N02 is a power supply potential supply wire for 2, VSS2 is a ground potential supply part for 2, N12 is a ground potential supply wire for 2, and VDD3 is a power supply for 3. A potential intake portion, N03 is a power supply potential supply wiring for 3, VSS3 is a ground potential intake portion for 3, and N13 is a ground potential supply wiring for 3. The power supply potential intake section and the ground potential intake section are separately provided for each of the input circuit, the output circuit, and the processing circuit.

[0008]

According to the present invention, even if noise occurs in the processing circuit, the input circuit is not affected by the noise.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram showing a conventional embodiment.

[Explanation of symbols]

 1 ・ ・ ・ ・ Input circuit 2 ・ ・ ・ ・ Processing circuit 3 ・ ・ ・ ・ Output circuit 4 ・ ・ ・ ・ Semiconductor device VDD1 ・ ・ ・ ・ Power supply potential intake part for 1 VDD2 ・ ・ ・ ・ Power supply potential intake part for 2 VDD3 ・ ・ ・ ・ Power supply potential intake part for 3 VDD4 ・ ・ ・ ・ Power supply potential intake part common to 1 and 2 VSS1 ・ ・ ・ ・ Ground potential intake part paired with VDD1 VSS2 ・ ・ ・ ・ Paired with VDD2 Ground potential take-in section VSS3 ・ ・ ・ ・ Ground potential take-in section paired with VDD3 VSS4 ・ ・ ・ ・ Ground potential take-in section paired with VDD4 N01 ・ ・ ・ ・ Power supply line for 1 N02 ・ ・ ・ ・ 2 Power supply potential supply wiring N03 ・ ・ ・ Power supply potential supply wiring for 3 N04 ・ ・ ・ Power supply potential supply wiring common to 1 and 2 N11 ・ ・ ・ Ground potential supply wiring for 1 N12 ・ ・ ・ Ground potential for 2 Supply wiring N13 ・ ・ ・ ・Common ground potential supply line to the ground potential supply line N14 · · · · 1 and 2 for

Claims (1)

[Claims] 1. An input circuit for receiving an input signal from the outside,
In a semiconductor device comprising an output circuit for outputting an output signal to the outside and a processing circuit for performing processing based on the signal received by the input circuit to generate an output signal to the output circuit, receiving a power source from outside the semiconductor device A semiconductor device, wherein parts are separately provided for the input circuit, the output circuit, and the processing circuit.