CN101685296B - Control circuit of single-chip integrated circuit - Google Patents

Abstract

The application provides a single-chip integrated circuit's control circuit, this single-chip integrated circuit is controlled by external power supply, and this control circuit includes: a power regulator circuit controlled by the external power source and including a power regulator for generating an internal power source when the power regulator is turned on for operation of internal circuits of the single-chip integrated circuit; a micro processing unit (MCU) controlled by the internal power supply and generating a shutdown signal to the power regulator circuit to shut down the power regulator when the internal circuit of the single chip integrated circuit is in standby; and the trigger circuit is controlled by the external power supply and generates a trigger signal to the power supply regulating circuit based on an external signal so as to start the power supply regulator.

Description

Single-chip integrated circuit control circuit

technical field

The present application relates to a control circuit of a single-chip integrated circuit, in particular to a control circuit of a power regulator of a single-chip integrated circuit.

Background technique

In a single-chip integrated circuit (IC), due to factors such as the manufacturing process and power consumption, the input-output (IO) interface is inconsistent with the power supply of the main working circuit in the chip. For this reason, the circuit designer will set the A power regulator (regulator) to provide the power required by the main working circuits in the chip.

However, since the power regulator can provide the main power required by the monolithic integrated circuit, once the power regulator is turned off, the monolithic integrated circuit cannot automatically resume operation. But if the power regulator is not turned off, the power regulator will continue to consume power when the monolithic IC goes into standby mode and is not working.

In order to solve this problem, the known techniques all need to directly turn on/off the power regulator through an external control circuit. However, in this way, the single-chip integrated circuit will not be automatically controlled internally to enter the standby mode, but needs another control unit to assist in the control; this not only complicates the interface, but may even require another external power supply. A micro-processing unit is used for control, so the manufacturing cost will be increased, and the energy-saving effect will also be affected.

Contents of the invention

Therefore, the applicant has finally conceived the "control circuit of a single-chip integrated circuit" of the application through careful experiments and researches and in the spirit of perseverance in view of the shortcomings of the known technology. The following is a brief description of the application .

Therefore, it is necessary to conceive a control circuit of a single-chip integrated circuit, which divides the control power of the power regulator in the single-chip integrated circuit into two parts: (1) when the single-chip integrated circuit is going to enter the standby mode, by using the power supply The micro-processing unit of the regulator's output power supply generates a shutdown signal, so that the power regulator is turned off to enter the standby mode to achieve the purpose of completely saving energy; and (2) when the single-chip integrated circuit is to be in the working mode again, it will use the A simple circuit with an external power supply generates a trigger signal to turn on the power regulator to enter the working mode, so that the internal circuit of the single-chip integrated circuit starts working again.

According to the above idea, the present application proposes a control circuit of a single-chip integrated circuit, the single-chip integrated circuit is controlled by an external power supply, and the control circuit includes: a power regulation circuit, which is controlled by the external power supply and includes a power regulator ( regulator), when the power regulator is turned on, it can generate an internal power supply for the operation of the internal circuit of the single-chip integrated circuit; a micro-processing unit (MCU), which is controlled by the internal power supply, and integrated in the single-chip When the internal circuit of the circuit is on standby, a shutdown signal is generated to the power regulation circuit to turn off the power regulator; and a trigger circuit, which is controlled by the external power supply, generates a trigger signal to the power regulation circuit based on an external signal, to turn on the power regulator.

According to the above idea, wherein the power regulation circuit further includes: a level shifter, which is controlled by the external power supply and coupled to the micro-processing unit, and receives the shutdown signal to generate a level shift signal; and a register, which is controlled by The external power supply generates a turn-on signal to turn on the power regulator when receiving the trigger signal, and generates a turn-off signal to turn off the power regulator when receiving the level conversion signal.

According to the above idea, wherein the power regulation circuit further includes: a level shifter, which is controlled by the external power supply and coupled to the micro-processing unit, and receives the shutdown signal to generate a level shifting signal; and an SR latch, which Controlled by the external power supply, an on signal is generated to turn on the power regulator when the trigger signal is received, and a shutdown signal is generated to turn off the power regulator when the level conversion signal is received.

According to the above idea, the power regulation circuit further includes: a low voltage detector, which is controlled by the external power supply and coupled to the level shifter, when it detects that the internal power supply generated by the power regulator is low level, turn off the level shifter.

The control circuit of the present application can effectively solve the problem of continuous power consumption of the power regulator in the standby mode of the single-chip integrated circuit, so that the single-chip integrated circuit can achieve more energy-saving and power-saving purposes.

This application can be understood more deeply through the following illustrations and detailed descriptions:

Description of drawings

Fig. 1: the circuit block diagram of the preferred embodiment of the control circuit of the single-chip integrated circuit proposed by the application;

Figure 2: A block diagram of a first preferred embodiment of the power conditioning circuit in Figure 1; and

FIG. 3 : Circuit block diagram of a second preferred embodiment of the power conditioning circuit in FIG. 1 .

Detailed ways

Please refer to FIG. 1 , which is a circuit block diagram of a preferred embodiment of the control circuit of the single-chip integrated circuit proposed in this application. In Fig. 1, the single-chip integrated circuit 10 is controlled by the external power supply VDD, wherein the single-chip integrated circuit 10 can be divided into two parts: the first part is the external power supply system 11, which is controlled by the external power supply VDD; the second part is The internal power system 12 is controlled by the internal power VCC output by the power regulation circuit 111 .

The external power supply system 11 includes a power regulation circuit 111 and a trigger circuit 112, both of which are controlled by the external power supply VDD. The power regulation circuit 111 also includes at least a power regulator 13 which is also controlled by the external power supply VDD.

The internal power system 12 includes a micro processing unit (MCU) 121 and an internal circuit 122, both of which are controlled by the internal power VCC.

The power regulation circuit 11 is controlled by the external power supply VDD. The power regulator 13 can generate an internal power supply VCC when turned on. The internal power supply VCC supplies the internal circuit 12 in the single-chip integrated circuit 10 for working mode.

And when the internal circuit 12 in the single-chip integrated circuit 10 is converted into the standby mode, after each sub-circuit in the internal circuit 12 is closed one by one, the microprocessing unit 121 will generate a shutdown signal to the power regulation circuit 111 to turn off the power regulator 13. In this way, when the internal circuit 12 in the single-chip integrated circuit 10 is in the standby mode, the power regulator 13 can also be in the standby mode, so as to save power consumption of the system.

On the other hand, when the internal circuit 12 in the single-chip integrated circuit 10 is converted into an operating mode, the trigger circuit 112 generates a wakeup signal to the power regulation circuit 111 based on an external signal, so as to turn on the power regulator 13. 13 will generate the internal power supply VCC again for the use of the internal circuit 12 in the working mode.

It is worth mentioning that the aforementioned external signal not shown in the figure may be a signal of an external pin (pin) of the single-chip integrated circuit 10 , or be generated by a combination of some special control signals.

Please refer to FIG. 2 , which is a circuit block diagram of a first preferred embodiment of the power regulation circuit in FIG. 1 , wherein the same elements as those in FIG. 1 are designated with the same symbols. In FIG. 2 , in order to match the aforementioned trigger circuit 112 to realize the technical features of the present application, the power regulation circuit 11 is configured with a register 14 and a level shifter 15 in addition to the power regulator 13 .

In FIG. 2 , the power regulator 13 is controlled by the register 14 to generate a high-level turn-on signal EN or a low-level turn-off signal DIS; Power supply VCC.

As mentioned above, when the internal circuit 12 in the single-chip integrated circuit 10 is converted into the standby mode, after each sub-circuit in the internal circuit 12 is closed one by one, the microprocessing unit 121 will generate a shutdown signal to the power regulation circuit 111 in order to turn off the power regulator 13. After the level converter 15 receives the shutdown signal, it generates a level conversion signal to the register 14, and the register 14 generates a low-level shutdown signal DIS accordingly, so that the power regulator 13 is in standby mode to save power consumption of the system .

Conversely, when the internal circuit 12 in the single-chip integrated circuit 10 is converted into an operating mode, the trigger circuit 112 generates a wakeup signal to the power regulation circuit 111 based on an external signal, so as to turn on the power regulator 13 . After the register 14 receives the trigger signal, it generates a high-level enable signal EN to turn on the power regulator 13. The power regulator 13 will be in the working mode and generate the internal power supply VCC again for the internal circuit 12 in the working mode.

It should be pointed out that in the power regulation circuit 111 of FIG. 2 , a low voltage detection circuit 16 can also be added to detect that the power regulator 13 itself drops to ground level after it is turned off (in standby mode). Therefore, when the power regulator 13 is in the standby mode, the level shifter 15 is turned off, so as to prevent the logic circuit of the subsequent stage from generating an improper DC path.

Please refer to FIG. 3 , which is a circuit block diagram of a second preferred embodiment of the power regulation circuit in FIG. 1 , wherein the same elements as those in FIG. 1 are assigned the same symbols. The difference between Fig. 3 and Fig. 2 is that the register 14 in Fig. 2 can be replaced by an SR latch 14', so the trigger signal is changed from applicable to square wave and pulse wave to only applicable to pulse wave.

To sum up, the present application provides a control circuit of a single-chip integrated circuit. When the single-chip integrated circuit enters the standby mode, the micro-processing unit using the output power of the power regulator generates a shutdown signal, so that the power regulator Turn off to enter the standby mode to achieve the purpose of complete energy saving, and when the single-chip integrated circuit is in the working mode, the trigger circuit using the external power supply is used to generate a trigger signal, and the power regulator is turned on to enter the working mode, so that the single-chip integrated circuit The internal circuit starts working again.

Various changes and modifications may be made to the present application by those skilled in the art without departing from the scope of the appended claims.

Claims (4)

1. A control circuit of a single-chip integrated circuit, the single-chip integrated circuit is controlled by an external power supply, and the control circuit includes: A power regulation circuit, which is controlled by the external power supply and includes a power regulator, which can generate internal power when the power regulator is turned on, for the operation of the internal circuit of the single-chip integrated circuit; a micro-processing unit, which is controlled by the internal power supply, and generates a shutdown signal to the power regulation circuit to turn off the power regulator when the internal circuit of the single-chip integrated circuit is on standby; and a trigger circuit, which is controlled by the external power supply, and generates a trigger signal to the power regulation circuit based on an external signal to turn on the power regulator; Wherein the power regulation circuit further includes: a level shifter, which is controlled by the external power supply and coupled to the micro-processing unit, receives the closing signal to generate a level shifting signal; and A register, which is controlled by the external power supply, generates an on signal to turn on the power regulator when receiving the trigger signal, and generates an off signal to turn off the power supply when receiving the level conversion signal Regulator. 2. The control circuit of claim 1, wherein the power regulation circuit further comprises: a low voltage detector, which is controlled by the external power supply and coupled to the level shifter, and shuts off the power supply when detecting that the internal power supply generated by the power regulator is at a low level level converter. 3. A control circuit of a single-chip integrated circuit, the single-chip integrated circuit is controlled by an external power supply, and the control circuit includes: A power regulation circuit, which is controlled by the external power supply and includes a power regulator, which can generate internal power when the power regulator is turned on, for the operation of the internal circuit of the single-chip integrated circuit; a micro-processing unit, which is controlled by the internal power supply, and generates a shutdown signal to the power regulation circuit to turn off the power regulator when the internal circuit of the single-chip integrated circuit is on standby; and a trigger circuit, which is controlled by the external power supply, and generates a trigger signal to the power regulation circuit based on an external signal to turn on the power regulator; Wherein the power regulation circuit further includes: a level shifter, which is controlled by the external power supply and coupled to the micro-processing unit, receives the closing signal to generate a level shifting signal; and An SR latch, which is controlled by the external power supply, generates an on signal to turn on the power regulator when receiving the trigger signal, and generates an off signal to turn off the power regulator when receiving the level conversion signal the power regulator. 4. The control circuit of claim 3, wherein the power regulation circuit further comprises: a low voltage detector, which is controlled by the external power supply and coupled to the level shifter, and shuts off the power supply when detecting that the internal power supply generated by the power regulator is at a low level level converter.

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