Digital-analog integrated circuit and control method thereof

Abstract

The invention discloses a digital-analog integrated circuit and a control method thereof. The digital-analog integrated circuit includes: a clock module, which is used for generating a clock signal; a digital module, which is used for carrying out initialization and partial works according to the clock signal, and generating an initialization completion signal, a work completion signal and a control signal; a starting module, which is used for providing a starting signal for the clock module according to the initialization completion signal, the work completion signal, the control signal and a reset signal, and used for controlling the clock signal before the digital module completes the initialization and the partial works; and a software unit, which is used for controlling the clock signal after the digital module completes the initialization and the partial works. According to the circuit, self-starting of the clock module can be realized, the circuit power consumption is reduced, and the simplicity of application is improved.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a digital-analog integrated circuit and a control method thereof. Background technique [0002] In recent years, digital-analog integrated circuits have been used more and more widely in electronic products. In the process of information exchange between digital modules and analog modules in digital-analog integrated circuits, crystal resonators in analog modules are generally used as The digital module provides a clock signal, the digital module configures the register through the bus protocol, and the register provides a control signal for the analog module to realize the function control of the analog module. For the digital module, it needs the clock signal provided by the analog module to complete the initialization and part of the digital work. However, the crystal resonator used to provide the clock signal needs to obtain the start signal from the digital module to start...

AI Technical Summary

Problems solved by technology

In the prior art, in order to enable the digital module to enter the initialization state after completing the reset operation, the crystal resonator in the analog module is usually turned on by default until the crystal resonator is turned off through software configuration, or the crystal in the analog module The resonator is always on, which greatly increases the power consumption of the digital-analog integrated circuit, and the moment when the software configuration turns off the crystal oscillator depends on unmeasurable factors such as system scheduling and software-hardware interaction, which reduces the reliability of the digital-analog integrated circuit application. sex and simplicity

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