Oscillation module and signals calibrating method of the same

摘要

An oscillation module includes a frequency generator, a signal calibrator, a multiplexer, and a controller. The oscillation module is calibrated by using calibration parameters and a control instruction of which the frequency and phase are the same as the oscillation frequency signal generated by the frequency generator. As a consequence, an electronic pin used for processing asynchronous signals can be saved so as to reduce the chip area of the oscillation module.

主权项

1. An oscillation module, comprising:
a frequency generator including a first end, a second and a third end, which is grounded, and the first end and the second end respectively outputting an oscillation frequency signal; a multiplexer including a first end, a second end, a third end and a fourth end, and the second end thereof is electrically connected to the second end of the frequency generator to receive the oscillation frequency signal and the oscillation frequency signal is outputted from the first end thereof, the third end thereof is grounded; a controller including a first end, a second end, a third end, a fourth end and a fifth end, and the second end thereof is electrically connected to an external voltage source and the third end thereof is grounded, the fourth end thereof is electrically connected to the first end of the multiplexer to receive the oscillation frequency signal, the first end thereof outputs the oscillation frequency signal and a first serial signal parameter to outside of the oscillation module, and the first end thereof receives the first serial signal parameter, a first serial control instruction and a second serial control instruction in accordance with the oscillation frequency signal, the first serial signal parameter, the first serial control instruction and the second serial control instruction also have the same phase and frequency with the oscillation frequency signal, and the fifth end thereof outputs the first serial signal parameter, the first serial control instruction and the second serial control instruction; and a signal calibrator including a first end, a second end, a third end, a fourth end and a fifth end, and the third end thereof is grounded, the first end thereof is electrically connected to the fourth end of the multiplexer, the second end thereof is electrically connected to the fifth end of the controller, the fourth end thereof is connected to the first end of the frequency generator, the fifth end thereof is electrically connected to the external voltage source, the fourth end thereof is to receive the oscillation frequency signal outputted from the first end of the frequency generator, the second end thereof is to receive the first serial signal parameter, the first serial control instruction and the second serial control instruction in accordance with the oscillation frequency signal outputted from the fifth end of the controller, the signal calibrator converts the first serial signal parameter to be a first parallel signal parameter in accordance with the first serial control instruction so as to decode and save the first parallel signal parameter, the signal calibrator reads the first parallel signal parameter in accordance with the second serial signal instruction and converts the first parallel signal parameter back to be the first serial signal parameter to output to the fourth end of the multiplexer, and the first end of the multiplexer outputs the first serial signal parameter to the fourth end of the controller; wherein the oscillation module only includes three electrical pins, and one of the electrical pins is electrically connected to the third end of the signal calibrator, the other two of the electrical pins are electrically connected to the first end of the controller and the fifth end of the signal calibrator respectively.