Portable device and calibration method thereof

Patent metadata

Field	Value
Publication number	US-10114437-B2
Application number	US-201615221919-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Jul 29, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A portable device is provided. A first processor performs an initial procedure according to an operation clock with a first frequency value and an operation voltage with a first voltage value, and performs a calibration procedure according to the operation clock with a second frequency value and the operation voltage with a second voltage value when the initial procedure has been performed and a self-calibration event is present. A second processor detects whether a specific function of the calibration procedure is being performed by the first processor. The second processor stores the second frequency value and the second voltage value into a storage unit after the calibration procedure is performed. The second voltage value is lower than the first voltage value, and the second frequency value is lower than the first frequency value.

First claim

What is claimed is:

1. A portable device, comprising:
a first processor, performing an initial procedure according to an operation clock with a first frequency value and an operation voltage with a first voltage value, and performing a calibration procedure according to the operation clock with a second frequency value and the operation voltage with a second voltage value when the initial procedure has been performed and a self-calibration event is present;
a storage unit; and
a second processor, detecting whether a specific function of the calibration procedure is being performed by the first processor,
wherein the second processor stores the second frequency value and the second voltage value into the storage unit after the calibration procedure is performed,
wherein the second voltage value is lower than the first voltage value, and the second frequency value is lower than the first frequency value.

2. The portable device as claimed in claim 1 , wherein after the second frequency value and the second voltage value are stored in the storage unit, the second processor resets the first processor to perform a normal boot procedure, and the first processor performs the normal boot procedure according to the operation clock with the stored second frequency value and the operation voltage with the stored second voltage value.

3. The portable device as claimed in claim 1 , wherein when the second processor detects that the specific function of the calibration procedure has not been completed during a specific time period, the second processor resets the first processor to perform a normal boot procedure, and the first processor performs the normal boot procedure according to the operation clock with a third frequency value and the operation voltage with a third voltage value.

4. The portable device as claimed in claim 3 , wherein the third frequency value and the third voltage value are stored in the storage unit, and the third voltage value is greater than the second voltage value.

5. The portable device as claimed in claim 1 , further comprising:
a DRAM, storing a program code corresponding to the calibration procedure;
a power management module, providing the operation voltage according to a first control signal from the first processor; and
a clock module, providing the operation clock according to a second control signal from the first processor,
wherein the first processor provides the first control signal and the second control signal according to the program code stored in the DRAM.

6. The portable device as claimed in claim 1 , wherein the self-calibration event is present when a time interval between a previous initial procedure and the initial procedure exceeds a specific time interval, or an ambient temperature is outside a specific temperature range.

7. A calibration method for a portable device, comprising:
performing a specific function of a calibration procedure with a first operation voltage, by a first processor of the portable device, when the portable device is powered on and a self-calibration event is present;
decreasing the first operation voltage via a power module of the portable device, performed by the first processor;
performing the specific function of the calibration procedure with the decreased first operation voltage until the decreased first operation voltage is equal to a threshold value, performed by the first processor; and
resetting the first processor using a second processor of the portable device when the specific function of the calibration procedure has been performed with the decreased first operation voltage equal to the threshold value or the specific function of the calibration procedure has not been completed during a specific time period,
wherein the first processor is reset to perform a normal boot procedure.

8. The calibration method as claimed in claim 7 , further comprising:
storing the first operation voltage into a storage unit after the specific function of the calibration procedure has been performed with the first operation voltage, performed by the first processor,
wherein the first operation voltage is decreased after the first operation voltage is stored into the storage unit.

9. The calibration method as claimed in claim 8 , further comprising:
performing a normal application according to the stored first operation voltage after the normal boot procedure has been performed.

10. The calibration method as claimed in claim 7 , further comprising:
detecting whether the specific function of the calibration procedure is being performed in the specific time period, wherein the detecting is performed by the second processor.

11. The calibration method as claimed in claim 7 , wherein the step of performing the specific function of the calibration procedure with the first operation voltage, performed by the first processor of the portable device, when the portable device is powered on and the self-calibration event is present further comprises:
performing an initial procedure with a second operation voltage that is higher than the first operation voltage, performed by the first processor, when the portable device is powered on;
determining whether the self-calibration event is present, performed by the first processor, when the initial procedure is performed; and
performing the specific function of the calibration procedure with the first operation voltage, performed by the first processor, when determining the self-calibration event is present.

12. The calibration method as claimed in claim 11 , wherein the step of determining whether the self-calibration event is present, performed by the first processor, when the initial procedure is performed further comprises:
detecting a time interval between a previous initial procedure and the initial procedure;
detecting an ambient temperature,
wherein the self-calibration event is present when the time interval between a previous initial procedure and the initial procedure exceeds a specific time interval, or the ambient temperature is outside a specific temperature range.

13. A calibration method for a portable device, comprising:
performing an initial procedure according to a first operation voltage, via a first processor of the portable device, when the portable device is powered on;
performing a specific function of a calibration procedure according to a second operation voltage, performed by the first processor, when the initial procedure is performed and a self-calibration event is present;
decreasing the second operation voltage, performed by the first processor, when the specific function of the calibration procedure has been performed;
again performing the specific function of the calibration procedure according the decreased second operation voltage, performed by the first processor, when the decreased second operation voltage is greater than a threshold value;
detecting whether the decreased second operation voltage is equal to the threshold value, by a second processor of the portable device;
detecting whether the specific function of the calibration procedure has been completed during a specific time period, performed by the second processor; and
resetting the first processor performed by the second processor when the specific function of the calibration procedure has been performed according to the decreased second operation voltage equal to the threshold value or the specific function of the calibration procedure has not been completed during the specific time period,
wherein the first processor is reset to perform a normal boot procedure.

14. The calibration method as claimed in claim 13 , fur

Assignees

• Mediatek Inc

Inventors

• Zhuang Yi-Chang
• Yong Lee-Kee
• Kuo Wu-An
• Kao Yi-Ping
• Wang Alice
• Ko Uming

Classifications

• G06F1/24

  Resetting means · CPC title

• G06F1/26 Primary

  Power supply means, e.g. regulation thereof (for memories G11C) · CPC title

• G06F1/30

  Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations (for resetting only G06F1/24) · CPC title

• G06F9/4403

  Processor initialisation · CPC title

• H04B1/3827 Primary

  Portable transceivers · CPC title