Serial port programming and watchdog compatible circuit of electric driving controller of electric vehicle
A technology of electric vehicles and compatible circuits, applied in the direction of electric vehicles, control drives, program control devices, etc., can solve problems such as inability to program DSP, achieve the effect of less components, simple implementation, and stable and normal functions
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[0016] See figure 1 In this embodiment, the electric vehicle electric drive controller serial port programming and watchdog compatible circuit includes:
[0017] An external serial port programming enable signal terminal, when you need to use the serial port for programming, the external serial port programming enable signal terminal is directly connected to the serial port programming 12V ground enable signal;
[0018] A signal conversion circuit, which converts the 12V ground enable signal of the serial port programming into a 3.3V ground enable signal and the enable signal that can be received by the serial port programming enable pin in the DSP main control chip to identify the programming instruction;
[0019] A watchdog shielding circuit uses the 3.3V ground enable signal as the watchdog shielding signal. By shielding the watchdog function, the programming function is completed normally; and when the external serial port programming enable signal disappears, it will be restored...
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