Electronic device
A technology of electronic equipment and voltage, applied in the direction of electrical program control, electrical digital data processing, instruments, etc., can solve the problems that the stop signal cannot work normally, the main controller cannot generate the start signal, etc.
Inactive Publication Date: 2014-08-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
Therefore, when the power supply voltage of the slave controller is too small, the first clock line and the first data line are locked at a low level, and then the master controller cannot generate a start signal or a stop signal and cannot work normally.
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[0012] see figure 1 , which is a block diagram of an electronic device 10 in a preferred implementation manner. The electronic device 10 communicates with the first device 20 through a two-wire serial bus interface (not shown). The driving voltages of the electronic device 10 and the first device 20 are the first voltage and the second voltage respectively. In this embodiment, the first device 20 is a device disposed outside the electronic device 10, such as a DVD player. In other implementation manners, the first device 20 may also be a device inside the electronic device 10, such as a data storage.
[0013] The electronic device 10 includes a first power module 11 , a main controller 13 , a level conversion module 15 , a detection module 17 and a load 19 .
[0014] The first power module 11 is used to provide a first voltage. In this embodiment, the first voltage is 3.3V.
[0015] The main controller 13 is used to output the first clock information and the first data in...
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The invention relates to an electronic device which is in communication with a first device through a two-line-type serial communication bus communication interface. The electronic device comprises a first power module, a main controller, a level conversion module and a detection module. The first power module provides a first voltage, and the first device outputs a second voltage to the communication interface. The main controller outputs first clock information and first data information. The level conversion module converts the first clock information and the first data information into second clock information and second data information according to the first voltage and the second voltage, and the second clock information and the second data information are output to the first device. The detection module detects the first voltage and the second voltage and outputs a third voltage when the first voltage is larger than or equal to the second voltage. The level conversion module is further used for working according to the first voltage and the third voltage. The third voltage is larger than the first voltage.
Description
technical field [0001] The present invention relates to an electronic device, in particular to an electronic device communicating through a two-wire serial communication bus. Background technique [0002] The two-wire serial communication bus (Inter Integrated Circuit, I2C) is widely used in various electronic devices for connecting microcontrollers and other peripheral devices. Electronic devices with I2C include host controllers as well as microcontrollers. The master controller has a first clock line (Serial Clock Line) and a first bidirectional data line (Serial Date Line, SDA1). Peripheral devices include slave controllers electrically connected to the electronic devices. The slave controller includes a second clock line electrically connected to the first clock line and a second data line electrically connected to the first data line. During data transmission, the master controller outputs data after generating a start signal, and stops outputting data after generat...
Claims
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IPC IPC(8): G05B19/418
CPCG06F13/4291
Inventor 刘志纲高翌翔
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD