I use two GPIOs in the battery drive to check whether USB or AC charger is inserted There are three states: USB charging, AC charger charging and battery power supply When charging with USB or AC charger, aThe power plugIcon of, When there is only battery, there should be no "power plug" display on the taskbar of the CE system desktop The detection method is to determine whether the current GPIO status is "high or low" Under normal conditions, the system is normal at room temperature But as a high temperature experiment (46 ℃) When no external power supply (USB, AC charger) is plugged in, the icon "power plug" will appear in the corresponding position of the system taskbar (Note: During the high temperature test, the PDA is not operated at all, but only allowed to run the CE system by itself) What's the reason for this?? Does high temperature cause changes in GPIO status??
Thank you slyzhang!Our CPU is PXA270 of IntelThe temperature is less than 60 degrees, only 46 degreesI don't know whether there is pull-up or pull-down. I have to take a look at the diagram to knowdetailsreplyPublished on October 11, 2008 at 21:21
If there is no pull-up or pull-down, the GPIO port may be unstable under high temperature, which is very normal. 60 degrees generally exceeds the normal operating range of ordinary chips, and industrial products may reach the allowable range of 80 degrees. It is difficult to say generally
Thank you slyzhang! Our CPU is PXA270 of Intel The temperature is less than 60 degrees, only 46 degrees I don't know whether there is pull-up or pull-down. I have to take a look at the diagram to know
Product: PDA device, CPU: PXA270 Cause: In power management, the PDA has two power supply modes: 1, battery;2. External power supply or USB power supply When the current PDA is battery powered, there is no icon below the desktop of the CE system (on the taskbar), and the battery is displayed in the power management of the control panel When the current PDA is plugged in to the external power supply or USB power supply, it is below the desktop of the CE system
Product: PDA device, CPU: PXA270 Cause: In power management, the PDA has two power supply modes: 1, battery;2. External power supply or USB power supply When the current PDA is battery powered, there is no icon below the desktop of the CE system (on the taskbar), and the battery is displayed in the power management of the control panel When the current PDA is plugged in to the external power supply or USB power supply, it is below the desktop of the CE system
The development board with power supply that is designed and proofed by individuals, the private chat that is idle at home and needs, the development board, if its own power supply is not suitable for the development board, it can be used as light control, temperature control, and display with digital tube,
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