Power supply control system of singlechip

Abstract

The invention provides a power supply control system of a singlechip, comprising an internal steady pressure source module, an external steady pressure source module, an awakening key, a power supply control module and a unidirectional conduction module, wherein the internal steady pressure source module is connected with the inner core of the singlechip; the external steady pressure source module is respectively connected with an external power supply and the internal steady pressure source module; the power supply control module is respectively connected with the inner core of the singlechip, the external steady pressure source module, the internal steady pressure source module and the awakening key; and the unidirectional conduction module is respectively connected with the inner core of the singlechip and the external power supply. When the singlechip enters a power saving mode, because the inner core of the singlechip is supplied with a low-voltage power supply, the internal steady pressure source module is instructed to enter a low-power state or closed state, and / or the external steady pressure source module is instructed to enter the closed state while parts of circuit inthe inner core of the singlechip can be maintained to work. Because the internal steady pressure source module and the external steady pressure source module consume certain electric energy when working, the standby power consumption of the singlechip and the whole circuit system can be further lowered after the internal steady pressure source module and the external steady pressure source moduleare turned off without influence on awakening the singlechip from the power saving mode.

Description

technical field [0001] The invention relates to the technical field of energy saving of single-chip microcomputers, in particular, the invention relates to a power supply control system of single-chip microcomputers. Background technique [0002] The power control system of existing one-chip computer sees figure 1 As shown, the power control system 100 may include: [0003] Internal voltage stabilizing source module 103 is connected with single-chip microcomputer core 101 (single-chip microcomputer core 101 forms single-chip microcomputer 107 together with internal voltage stabilizing source module 103), is used for supplying normal current to single-chip microcomputer core 101 when single-chip microcomputer 107 is in normal mode, enters province Enter the low power consumption state according to the instruction of the single-chip microcomputer core 101 during electric mode; [0004] The external voltage stabilizing source module 109 is connected to the external power supp...

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Problems solved by technology

[0006] The defect of the above-mentioned power supply control system 100 is: (1) after the single-chip microcomputer 107 enters the power-saving mode, the internal voltage-stabilizing source module 103 can only be made to enter the low-power consumption mode and cannot be closed. Otherwise, the single-chip microcomputer core 101 Or the entire single-chip microcomputer 107 has lost the power supply, and it cannot return to the normal mode from the power-saving mode; (2) similarly, after the single-chip microcomputer 107 enters the power-saving mode, the external voltage regulator module 109 cannot be turned off equally.

[0007] Since the internal voltage stabilizing source module 103 and / or the external voltage stabilizing source module 109 itself will consume a certain amount of electric energy, even in the low power consumption mode, the existing power supply control system cannot further reduce the power consumption of the single-chip microcomputer and the entire single-chip microcomputer circuit system. Standby power consumption

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