Special microprocessor chip for handset charging backup device

Abstract

The invention relates to a special microprocessor chip for a handset charging backup device, belonging to the technical field of integrated circuits. In the invention, according to a joint of a handset charger, a microprocessor integrating a USB (universal serial bus) host and guest joints is designed, and a UART (Universal Asynchronous Receiver/Transmitter) joint, an RC (resistance capacitance) oscillator with high precision and a phase locking loop (PLL) are integrated in the chip, thereby integrating a debugging interface. Small encapsulating forms such as SSOP16, QFN16 and the like can be used for encapsulating the chip, thus being beneficial for saving the area of a circuit board occupied by the chip. The chip leads the handset charging backup device has the advantages of having large backup data memory capacitance, increasing the handset compatibility by updating programs, avoiding to changing the appearance design and dies of a normal handset charger, having a high cost performance, and the like.

Description

technical field [0001] The invention belongs to the field of integrated circuits, in particular to core components of a mobile phone charger with a backup function. Background technique [0002] With the standardization of mobile phone charging interfaces and the popularization of mobile phones, the market capacity of mobile phone charging adapters (referred to as chargers) has reached the level of hundreds of millions per year, and there is a growing trend. The mobile phone charger with backup function is an innovative upgrade of ordinary mobile phone chargers. There is an invention patent (application number 200510037381) named "method and device for backing up information in mobile phone in mobile phone charger". According to the implementation method described in this invention patent, the mobile phone charger with backup function (hereinafter referred to as the charging backup device) is designed based on a general-purpose single-chip microcomputer, and the data is stor...

AI Technical Summary

Problems solved by technology

The main disadvantages of the implementation method: ①General-purpose single-chip microcomputers generally do not integrate the USB host interface. In order to meet the USB charger interface standard, a special USB host chip needs to be used, which increases the cost and volume accordingly; ②Serial EEPROM memory is generally relatively Small, less than 64K bits are commonly used and the cost is low, but the capacity is far from meeting the needs of the current mobile phone address book information. If a large-capacity EEPROM memory is used, the cost will increase significantly

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