Luckfox Pico Pro / Max Schematic errors
Posted: 2024-06-18 1:00
In the Luckfox Wiki Downloads, the schematic for the Luckfox Pico Pro / Max has a devastating error.
The power rail for VCC_DDR is 1.8v and connected directly to VCC_1V8, however, according to the RV1106 datasheet it uses DDR3L which is 1.35v.
Using this schematic with 1.8v should destroy the chip.
Also, CPU_AVS (Pin 74) connects to nothing. This is the ARM Adaptive Voltage Scaling control and it should be connected to the Feedback of the VCC_ARM power supply to increase or decrease the power used. In this schematic it is left floating.
So is it that the datasheet is wrong or the schematic is wrong? Or one has been updated and the other has not?
Any clarification?
Thank you.
The power rail for VCC_DDR is 1.8v and connected directly to VCC_1V8, however, according to the RV1106 datasheet it uses DDR3L which is 1.35v.
Using this schematic with 1.8v should destroy the chip.
Also, CPU_AVS (Pin 74) connects to nothing. This is the ARM Adaptive Voltage Scaling control and it should be connected to the Feedback of the VCC_ARM power supply to increase or decrease the power used. In this schematic it is left floating.
So is it that the datasheet is wrong or the schematic is wrong? Or one has been updated and the other has not?
Any clarification?
Thank you.