Micro-system for burn-in system program from a plug-able subsystem into main memory and method thereof
AssigneeCheertek Incorporation
InventorChi-Cheng Hung
Life of this patent
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Abstract
This invention relates to a micro-system for burn-in system program from a backup memory of plug-able subsystem into main memory and method thereof, wherein data codes via the data bus accessed by processor from the backup memory or the main memory are determined by two devices for adjusting level.
Claims20
A micro-system for burning-in a system program from a plug-able subsystem into a main memory, comprising:
- a processor for sending out a first control signal and a second control signal;
- a main memory connected electrically with said processor for transferring data between said processor and said main memory;
- a device for adjusting to a first logic-level connected electrically with said processor for receiving said first control signal and connected electrically with said main memory for changing a logic-level of a third control signal to said first logic-level to enable said main memory;
- and
- a plug-able subsystem with a backup memory connected electrically with said processor for receiving said second control signal, wherein data are transferred between said backup memory and said processor when said second control signal is at said first logic-level, and said plug-able subsystem sends out a forth control signal to said main memory for changing said third control signal to a second logic-level to disable said main memory, and the data are not transferred between said backup memory and said processor when said second control signal is at said second logic-level, and said third control signal is at said first logic-level to enable said main memory for transferring data between said processor and said main memory.
A method for burning-in a system program from a plug-able subsystem into a main memory in a micro-system, wherein said micro-system includes a processor, a main memory, a device for adjusting to a first logic-level to enable said main memory, and said plug-able subsystem with a backup memory, comprising the steps of:
- sending out a first control signal for changing a logic-level of a third control signal and a second control signal to said plug-able subsystem from said processor, wherein a logic-level of said second control signal level is at a first logic-level to enable said plug-able subsystem, and a logic-level of said third control signal is changed to said first logic-level by said device for adjusting to a first logic-level;
- sending out a forth control signal from said plug-able subsystem for changing the logic-level of said third control signal to a second logic-level to disable the main memory;
- transferring data between said backup memory and said processor;
- sending out said second control signal to said plug-able subsystem from said processor, wherein said second control signal is at said second logic-level to disable the plug-able subsystem and said forth control signal is not sent out from said plug-able subsystem again;
- and
- transferring data between said main memory and said processor.
Dependencies are inferred from the claim text.