Method and apparatus for handling a charging state in a mobile electronic device

• US 8,610,407 B2
• Filed: 10/04/2012
• Issued: 12/17/2013
• Est. Priority Date: 05/27/2003
• Status: Active Grant

• Current Assignee: Fundamental Innovation Systems International LLC (Fundamental Innovation Systems International Holdings LLC)
• Original Assignee: Blackberry Limited
• Inventors: Veselic, Dusan, Skarine, Alexei
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): BOATENG, ALEXIS ASIEDUA
• Application Number:
  US13/645,152
• Publication Number:
  US 20130033226A1
• Time in Patent Office: 439 Days
• Field of Search: 320/155, 320/132, 320/156, 320/114, 320/107, 320/152, 320/145, 320/146, 320/112, 320/134, 320/161, 320/162, 320/165, 307/32, 307/34, 307/38, 307/152, 307/39
• US Class Current: 320/155
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: G06F 1/3215 Monitoring of peripheral devices
• CPC Class Codes: G06F 1/3246 by software initiated power-off
• CPC Class Codes: G06F 1/3253 Power saving in bus
• CPC Class Codes: H02J 2207/30 Charge provided using DC bus or data bus of a computer
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Disclosed is a mobile device comprising a voltage supervisor and reset (VSAR) module configured to detect an input voltage, start a timer set to a predetermined time period responsive to detecting the input voltage, and output a low signal responsive to detecting the input voltage. The mobile device also comprises a battery charger module configured to receive the input voltage, receive the low signal, output a power signal, and charge a battery. The mobile device also comprises a processing module configured to receive the power signal, and attempt enumeration responsive to receiving the power signal, wherein the VSAR module is further configured to output a high signal to the battery charger module when the timer expires and enumeration has not been completed.

Claims

1. A mobile device comprising:

a voltage supervisor and reset (VSAR) module configured to detect an input voltage, start a timer set to a predetermined time period responsive to detecting the input voltage, and output a low signal responsive to detecting the input voltage;

a battery charger module configured to receive the input voltage, receive the low signal, output a power signal, and charge a battery;

a processing module configured to receive the power signal, and attempt enumeration responsive to receiving the power signal,

the VSAR module further configured to output a high signal to the battery charger module when the timer expires and enumeration has not been completed.

2. The mobile device of claim 1, wherein the battery charging module is further configured to receive the high signal and cease charging the battery responsive to receiving the high signal.

3. The mobile device of claim 1, wherein the predetermined time period is 100 ms.

4. The mobile device of claim 1, wherein the input voltage is received from a USB host.

5. The mobile device of claim 4 wherein the enumeration is between the mobile device and the USB host.

6. The mobile device of claim 1, wherein the VSAR module is further configured to delay outputting the high signal for a predetermined delay time.

7. The mobile device of claim 6, wherein the predetermined delay time is 150 ms.

8. A method for charging comprising:

detecting an input voltage by a voltage supervisor and reset (VSAR) module

starting, by the VSAR module, a timer set to a predetermined time period responsive to detecting the input voltage

outputting, by the VSAR module, a low signal responsive to detecting the input voltage;

receiving the input voltage at a battery charger module;

receiving, by the battery charger module, the low signal;

outputting, by the battery charger module, a power signal

charging, battery charger module, a battery;

receiving the power signal at a processing module; and

attempting, by the processing module, enumeration responsive to receiving the power signal,

outputting, by the VSAR module, a high signal to the battery charger module when the timer expires and enumeration has not been completed.

9. The method of claim 8, further comprising receiving, by the battery charging module, the high signal and ceasing charging the battery responsive to receiving the high signal.

10. The method of claim 8, wherein the predetermined time period is 100 ms.

11. The method of claim 8, wherein the input voltage is received from a USB host.

12. The method of claim 11 wherein the enumeration is between the mobile device and the USB host.

13. The method of claim 8, further comprising delaying, by the VSAR module, outputting the high signal for a predetermined delay time.

14. The method of claim 13, wherein the predetermined delay time is 150 ms.