Electronic apparatus

• US 20060098512A1
• Filed: 11/04/2005
• Published: 05/11/2006
• Est. Priority Date: 11/09/2004
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Tanaka, Tsutomu, Aoto, Kunihiko, Maruyama, Kiyoko
• Application Number:
  US11/266,781
• Publication Number:
  US 20060098512A1
• Time in Patent Office: Days
• US Class Current: 365/229
• CPC Class Codes: G11C 5/14 Power supply arrangements , e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels

Abstract

There is provided an electronic apparatus comprising a battery holder, a detector detecting a battery, a non-volatile memory storing a program for initialization, a volatile memory, a first power supply for the non-volatile memory, a second power supply for the volatile memory, a power switch, a power supply controller activating the first power supply and the second power supply after the battery is detected or after the power switch is turned on, and a management circuit sending the program from the non-volatile memory to the volatile memory if the first and the second power supplies are activated and before the program is fully sent to the volatile memory, causing the power supply controller to deactivate the first power supply after sending the program, and causing the program in the volatile memory to run after the power switch is turned on.

Claims

1. An electronic apparatus comprising:

a battery holder;

a detector for detecting a battery placed in the battery holder;

a non-volatile memory for storing a program for initialization;

a volatile memory;

a first power supply for supplying the non-volatile memory with power from the battery placed in the battery holder;

a second power supply for supplying the volatile memory with power from the battery placed in the battery holder;

a power switch for causing the first power supply and the second power supply to be activated;

a power supply controller for activating the first power supply and the second power supply after the detector detects the battery, and for activating the first power supply and the second power supply after the power switch is turned on; and

a management circuit for sending the program from the non-volatile memory to the volatile memory after the first power supply and the second power supply are activated and before the program is fully sent to the volatile memory, for causing the power supply controller to deactivate the first power supply after sending the program and before the power switch is turned on, and for causing the program in the volatile memory to run after the power switch is turned on.

2. The electronic apparatus of claim 1, wherein the power switch is one of a manual switch and an automatic switch with a timer.

3. The electronic apparatus of claim 1, wherein the detector detects the battery placed in the battery holder by sensing voltage of the output of the battery.

4. The electronic apparatus of claim 1, wherein the detector further measures voltage of an output of the battery placed in the battery holder, and the power supply controller activates the first power supply and the second power supply after the detector detects the battery wherein the measured voltage of the output of the battery is no lower than a predetermined value.

5. The electronic apparatus of claim 1, wherein the detector further measures voltage of an output of the battery placed in the battery holder, and the power supply controller further deactivates the second power supply after the measured voltage of the output of the battery falls below a threshold and before the power switch is turned on.

6. The electronic apparatus of claim 1 configured in a first housing and a second housing connected to each other and configured to open and close to each other, wherein the power switch is configured to be turned on after the first housing and the second housing open to each other.

7. The electronic apparatus of claim 1 configured in a first housing and a second housing connected to each other and configured to open and close to each other, and further comprising an additional switch configured to be turned on after the first housing and the second housing open to each other, wherein the power supply controller further acivates the first power supply and the second power supply after the additional switch is turned on.

8. An electronic apparatus comprising:

a battery holder;

a detector for detecting a battery placed in the battery holder and measuring voltage of an output of the battery;

a non-volatile memory for storing a program for initialization;

a volatile memory;

a power supply for supplying the non-volatile memory with power from the battery placed in the battery holder;

a back-up battery supplying the volatile memory with power;

a power switch for causing the power supply to be activated;

a power supply controller for activating the power supply after the detector detects the battery and for activating the power supply after the power switch is turned on; and

a management circuit for sending the program from the non-volatile memory to the volatile memory after the power supply is activated and before the program is fully sent to the volatile memory, for causing the power supply controller to deactivate the power supply after sending the program and before the power switch is turned on, and for causing the program in the volatile memory to run after the power switch is turned on.

9. The electronic apparatus of claim 8, wherein the management circuit further resumes sending the program after the power supply is deactivated while the program is being sent and deactivated thereafter.

10. An electronic apparatus comprising:

a battery holder;

a detector for detecting a battery placed in the battery holder and measuring voltage of an output of the battery;

a non-volatile memory for storing a program for initialization;

a volatile memory;

an additional memory for storing a plurality of specified data;

a first power supply for supplying the non-volatile memory and the additional memory with power from the battery placed in the battery holder;

a second power supply for supplying the volatile memory with power from the battery placed in the battery holder;

a power switch for causing the first power supply and the second power supply to be activated;

a power supply controller for activating the first power supply and the second power supply after the detector detects the battery, and for activating the first power supply and the second power supply after the power switch is turned on; and

a management circuit for finding out if a plurality of specified data is stored in the additional memory after the first power supply and the second power supply are activated and before the power switch is turned on, for sending the program from the non-volatile memory to the volatile memory after finding out that the specified data are stored in the additional memory, for causing the power supply controller to deactivate the first power supply after sending the program, and for causing the power supply controller to deactivate the first power supply and the second power supply after finding out that the specified data are out of the additional memory.

11. The electronic apparatus of claim 10, wherein the power supply controller further deactivates the second power supply after the management circuit sends the program and the measured voltage of the output of the battery falls below a threshold.

12. The electronic apparatus of claim 10, wherein the management circuit further finds out if the specified data are stored in the additional memory after the power switch is turned off.

13. The electronic apparatus of claim 10, wherein the power switch has a timer therein and the management circuit further finds out if the specified data are stored in the additional memory after the power switch is automatically turned off as controlled by the timer.

14. The electronic apparatus of claim 10 configured in a first housing and a second housing connected to each other and configured to open and close to each other, and further comprising an additional switch configured to be turned off after the first housing and the second housing close to each other, wherein the management circuit further finds out if the specified data are stored in the additional memory after the additional switch is turned off.

15. The electronic apparatus of claim 10, wherein the management circuit further finds out if the specified data are stored in the additional memory after the power switch is turned off, and the power supply controller further deactivates the second power supply after the measured voltage of the output of the battery falls below a threshold.

16. The electronic apparatus of claim 10, wherein the power switch has a timer therein and the management circuit further finds out if the specified data are stored in the additional memory after the power switch is automatically turned off as controlled by the timer, and the power supply controller further deactivates the second power supply after the measured voltage of the output of the battery falls below a threshold.

17. The electronic apparatus of claim 10 configured in a first housing and a second housing connected to each other and configured to open and close to each other, and further comprising an additional switch configured to be turned off after the first housing and the second housing close to each other, wherein the management circuit further finds out if the specified data are stored in the additional memory after the additional switch is turned off, and the power supply controller further deactivates the second power supply after the measured voltage of the output of the battery falls below a threshold.