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Embedded system dispensing with bootstrap memory and start-up and manufacturing method thereof

An embedded system and memory technology, applied in the direction of program loading/starting, program control devices, etc., can solve the problems of increasing system hardware cost, and achieve the effects of low cost, reduced hardware cost, and high portability

Inactive Publication Date: 2009-09-02
ZTE CORP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the embedded CPU is started, it must be guided by the BSP program (CPU initialization program) suitable for the embedded CPU, so that it can be started normally, that is, the basic parameters inside the CPU are configured, and the BSP program is generally stored in the BOOTROM. The BOOTROM chip is welded on the single-board CPU, which increases the hardware cost of the system

Method used

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  • Embedded system dispensing with bootstrap memory and start-up and manufacturing method thereof
  • Embedded system dispensing with bootstrap memory and start-up and manufacturing method thereof
  • Embedded system dispensing with bootstrap memory and start-up and manufacturing method thereof

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0018] The main concept of the present invention is: before the product leaves the factory, the system needs to have BOOTROM, and the level of the CPLD external pin is set to be high through the jumper. When the system starts, the CPLD internal register CE_reg is initialized to 0, and then the CPU The chip selection and high address lines are jointly decoded, the BOOTROM is selected to read the startup program, and the system is started; when the CPU needs to operate the FLASH, the CPU changes the value of the CPLD internal register CE_reg to 1, and then through the CPU chip selection and the high address line Decode together, strobe FLASH, and write the startup program into it. After the product leaves the factory, there is no BOOTROM in the system, and the level of the CPLD external pin is low. When the system starts to start, the CPU chip select and the high addres...

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Abstract

The invention discloses an embedded system that does not need a boot memory and its starting and manufacturing method, and belongs to the technical field of communication equipment system starting. The system of the present invention includes a central processing unit, a programmable controller, and a flash memory, wherein a system startup program is stored in the flash memory, and the default starts from the flash memory. When the chip selection of the central processing unit is valid, the system sets the high address of the central processing unit is the set value, that is, the flash memory is strobed, and the boot program is read from the flash memory. The invention also provides a starting method and a manufacturing method of the system. The invention saves the BOOTROM chip when the equipment leaves the factory, reduces the hardware cost of the product, makes the product more advantageous in price and more competitive in the market. At the same time, the invention is suitable for any embedded system where chip selection is critical, and has the characteristics of low cost and high portability.

Description

technical field [0001] The invention belongs to the technical field of system start-up of communication equipment, and in particular relates to an embedded system without a boot memory and a start-up and manufacturing method thereof. Background technique [0002] At present, most embedded CPU systems are connected to different external devices through several external chip select signals, such as boot memory BOOTROM, flash memory FLASH, synchronous dynamic memory SDRAM, programmable controller CPLD, etc. When the embedded CPU is started, it must be guided by the BSP program (CPU initialization program) suitable for the embedded CPU, so that it can be started normally, that is, the basic parameters inside the CPU are configured, and the BSP program is generally stored in the BOOTROM. The BOOTROM chip is welded on the single-board CPU, which increases the hardware cost of the system. Contents of the invention [0003] The technical problem to be solved by the present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/445
Inventor 李新双
Owner ZTE CORP
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